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707 vulnerabilities by python
CERTFR-2026-AVI-1423
Vulnerability from certfr_avis - Published: 2026-10-30 - Updated: 2026-10-30
Une vulnérabilité a été découverte dans CPython. Elle permet à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "CPython sans le dernier correctif de s\u00e9curit\u00e9",
"product": {
"name": "CPython",
"vendor": {
"name": "Python",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-116566",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-116566"
}
],
"initial_release_date": "2026-10-30T00:00:00",
"last_revision_date": "2026-10-30T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1423",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-10-30T00:00:00.000000"
}
],
"risks": [
{
"description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans CPython. Elle permet \u00e0 un attaquant de provoquer un probl\u00e8me de s\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur.",
"title": "Vuln\u00e9rabilit\u00e9 dans CPython",
"vendor_advisories": [
{
"published_at": "2026-10-29",
"title": "Bulletin de s\u00e9curit\u00e9 Python HCHE62VYTPYI6WOPJQDWUBR4CINBPSM7",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/HCHE62VYTPYI6WOPJQDWUBR4CINBPSM7/"
}
]
}
CERTFR-2026-AVI-1397
Vulnerability from certfr_avis - Published: 2026-10-28 - Updated: 2026-10-28
Une vulnérabilité a été découverte dans CPython. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "CPython sans le dernier correctif de s\u00e9curit\u00e9",
"product": {
"name": "CPython",
"vendor": {
"name": "Python",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-103995",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-103995"
}
],
"initial_release_date": "2026-10-28T00:00:00",
"last_revision_date": "2026-10-28T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1397",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-10-28T00:00:00.000000"
}
],
"risks": [
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans CPython. Elle permet \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Vuln\u00e9rabilit\u00e9 dans CPython",
"vendor_advisories": [
{
"published_at": "2026-10-27",
"title": "Bulletin de s\u00e9curit\u00e9 Python PSF-2026-47",
"url": "https://raw.githubusercontent.com/psf/advisory-database/main/advisories/python/PSF-2026-47.json"
}
]
}
CERTFR-2026-AVI-1379
Vulnerability from certfr_avis - Published: 2026-10-26 - Updated: 2026-10-26
De multiples vulnérabilités ont été découvertes dans CPython. Elles permettent à un attaquant de provoquer un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "CPython sans le dernier correctif de s\u00e9curit\u00e9",
"product": {
"name": "CPython",
"vendor": {
"name": "Python",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-114583",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-114583"
},
{
"name": "CVE-2026-115557",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-115557"
}
],
"initial_release_date": "2026-10-26T00:00:00",
"last_revision_date": "2026-10-26T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1379",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-10-26T00:00:00.000000"
}
],
"risks": [
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans CPython. Elles permettent \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans CPython",
"vendor_advisories": [
{
"published_at": "2026-10-24",
"title": "Bulletin de s\u00e9curit\u00e9 Python FNAJMZV6XQYLVPABNINDMF3VF66AYLW4",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/FNAJMZV6XQYLVPABNINDMF3VF66AYLW4/"
},
{
"published_at": "2026-10-22",
"title": "Bulletin de s\u00e9curit\u00e9 Python 43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/"
}
]
}
CVE-2026-114501 (GCVE-0-2026-114501)
Vulnerability from nvd – Published: 2026-10-21 21:17 – Updated: 2026-10-30 16:10
VLAI
EPSS
VEX
Title
Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT > 1
Summary
Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from im->blocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user's pixels or other process memory to another user. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:09 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10172 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/19… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 11.2.1, < 13.0.0
|
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CVE-2026-96778 (GCVE-0-2026-96778)
Vulnerability from nvd – Published: 2026-10-21 20:58 – Updated: 2026-10-28 01:53
VLAI
EPSS
VEX
Title
Pillow: Heap buffer overflow writing JPEG comment after ICC profile fills buffer
Summary
Pillow is a Python imaging library. From 9.4.0 until 13.0.0, ImagingJpegEncode() in src/libImaging/JpegEncode.c can call jpeg_write_marker() for a JPEG COM comment when an ICC profile has exactly filled the 65536-byte encoder buffer. libjpeg writes one byte before checking the exhausted free_in_buffer counter, which then wraps and permits the attacker-controlled comment and subsequent compressed image data to overwrite adjacent heap memory. Re-saving an untrusted image as JPEG while preserving its ICC profile and forwarded comment can crash the process and may enable code execution in suitable runtime and heap layouts. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 01:52 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10124 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/02… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 9.4.0, < 13.0.0
|
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CVE-2026-96644 (GCVE-0-2026-96644)
Vulnerability from nvd – Published: 2026-10-21 20:54 – Updated: 2026-10-28 18:22
VLAI
EPSS
VEX
Title
Pillow: Heap over-read in WMF/EMF rendering via 16-bit dimension truncation (Windows builds)
Summary
Pillow is a Python imaging library. Prior to 13.0.0 on Windows, src/PIL/WmfImagePlugin.py passes unchecked 32-bit WMF or EMF dimensions to the native drawwmf handler in src/display.c. The handler sizes a DIB allocation from 16-bit-truncated bcWidth and bcHeight fields but copies pixel data using the original full dimensions. A crafted wide, short metafile can pass the pixel-count decompression-bomb check and make the Windows-only renderer read beyond the heap buffer, potentially disclosing memory or crashing the process. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 18:22 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10120 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/4c… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96643 (GCVE-0-2026-96643)
Vulnerability from nvd – Published: 2026-10-21 20:56 – Updated: 2026-10-23 21:19
VLAI
EPSS
VEX
Title
Pillow: PNG eXIf chunk makes EXIF parsing run in quadratic time
Summary
Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load() in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new shrinking copy on every iteration and quadratic CPU work. The condition is reachable through Image.getexif(), Image._getexif(), and ImageOps.exif_transpose(), including common photo-upload rotation workflows. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 17:32 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10073 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/80… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 11.0.0, < 13.0.0
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CVE-2026-96642 (GCVE-0-2026-96642)
Vulnerability from nvd – Published: 2026-10-21 20:49 – Updated: 2026-10-30 16:07
VLAI
EPSS
VEX
Title
Pillow: TarIO negative size field causes infinite CPU-spin loop
Summary
Pillow is a Python imaging library. Prior to 13.0.0, the TarIO initializer in src/PIL/TarIO.py accepts a negative octal member size and computes a backward seek that returns to the same 512-byte header. When the requested member name does not match, the parser repeatedly reads that header, consumes a full CPU core, and never returns. TarIO is reached only when an application directly uses PIL.TarIO.TarIO rather than the default Image.open() path. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:07 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10012 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/19… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96641 (GCVE-0-2026-96641)
Vulnerability from nvd – Published: 2026-10-21 20:51 – Updated: 2026-10-28 01:50
VLAI
EPSS
VEX
Title
Pillow: Reachable undefined behavior in native integer operations, potentially leading to denial of service or logic integrity compromise
Summary
Pillow is a Python imaging library. Prior to 13.0.0, PILfont text-width accumulation in src/_imaging.c checks positive glyph advances against INT_MAX but does not check negative advances against INT_MIN. Repeating a signed 16-bit advance of -32768 can therefore execute a signed C integer overflow in xsize += dx, producing a large positive width from a negative mathematical result. Applications that use getlength(), getsize(), or derived layout, quota, serialization, or allocation calculations can experience logic-integrity errors or resource consumption, while the high-level mask path commonly retains a decompression-bomb check. This issue is fixed in version 13.0.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 01:50 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10010 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/80… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96640 (GCVE-0-2026-96640)
Vulnerability from nvd – Published: 2026-10-21 21:03 – Updated: 2026-10-28 01:57
VLAI
EPSS
VEX
Title
Pillow PDF append accepts malformed shared page-tree DAG causing resource exhaustion
Summary
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, PdfParser.linearize_page_tree() in src/PIL/PdfParser.py treats a PDF /Pages graph as a tree without tracking duplicate indirect references. When Image.save(..., format="PDF", append=True) processes an attacker-controlled existing PDF whose /Kids arrays repeatedly reference the same child /Pages node, Pillow expands the shared subtree as distinct pages. A compact malformed PDF can therefore create exponentially many page references and consume disproportionate CPU before the append completes. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 01:56 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10093 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/6f… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 5.1.0, < 13.0.0
|
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CVE-2026-96639 (GCVE-0-2026-96639)
Vulnerability from nvd – Published: 2026-10-21 21:06 – Updated: 2026-10-29 10:51
VLAI
EPSS
VEX
Title
Pillow multi-frame loaders can reuse stale native image storage after mode transitions
Summary
Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.load_prepare() reuses the stale native storage because _im is non-null without verifying that its mode and size still match. Crafted PSD, MPO, DCX, or MIC frame transitions can then write wider pixels into the narrow allocation, causing native out-of-bounds writes and crashes. The MPO path can also cause a native over-read and, in demonstrated runtime-specific profiles, command execution. This issue is fixed in version 13.0.0.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 10:51 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10105 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/78… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 11.0.0, < 13.0.0
|
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CVE-2026-96638 (GCVE-0-2026-96638)
Vulnerability from nvd – Published: 2026-10-21 20:47 – Updated: 2026-10-28 18:21
VLAI
EPSS
VEX
Title
Pillow: BMP RLE decoder memory-amplification DoS via unbounded delta escape / absolute mode
Summary
Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 18:20 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10015 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/e7… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 9.1.0, < 13.0.0
|
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CVE-2026-96637 (GCVE-0-2026-96637)
Vulnerability from nvd – Published: 2026-10-21 21:01 – Updated: 2026-10-23 21:18
VLAI
EPSS
VEX
Title
Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS
Summary
Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self._size without rerunning Image._decompression_bomb_check(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 17:32 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10076 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/7c… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
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CVE-2026-96636 (GCVE-0-2026-96636)
Vulnerability from nvd – Published: 2026-10-21 21:05 – Updated: 2026-10-30 16:08
VLAI
EPSS
VEX
Title
Pillow: Decompression-bomb protection bypass via multi-frame seek() in MPO and DCX (MpoImageFile.seek / DcxImageFile.seek)
Summary
Pillow is a Python imaging library. Prior to 13.0.0, MpoImageFile.seek() and DcxImageFile.seek() reparse later MPO or DCX frames and replace self._size without rerunning Image._decompression_bomb_check(). A crafted multi-frame image can use a tiny first frame to pass Image.open() and then declare an over-limit later frame. Normal frame iteration through seek(), load(), or ImageSequence.Iterator can decode that frame and commit hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:08 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10011 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/f1… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-112901 (GCVE-0-2026-112901)
Vulnerability from nvd – Published: 2026-10-19 22:09 – Updated: 2026-10-20 16:08
VLAI
EPSS
VEX
Title
Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes
Summary
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's XBM header parser is vulnerable to regular-expression denial of service. In XbmImageFile._open, when an application calls Image.open() on a small crafted XBM file, XbmImagePlugin applies a backtracking expression to the attacker-controlled header before image dimensions are accepted, stalling a worker for minutes and denying service. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 15:19 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/28… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-112900 (GCVE-0-2026-112900)
Vulnerability from nvd – Published: 2026-10-19 22:07 – Updated: 2026-10-20 14:43
VLAI
EPSS
VEX
Title
Pillow: Argument Injection in Ghostscript call, potentially leading into RCE
Summary
Pillow is a Python imaging library. From 2.6.0 until 13.0.0, Pillow is vulnerable to argument injection when invoking Ghostscript for EPS input. EpsImagePlugin.Ghostscript passes a caller-controlled input filename after -f without converting it to a safe absolute path, so a name beginning with a hyphen can be interpreted as a Ghostscript option. An attacker who controls the filename can inject Ghostscript arguments. Arbitrary command execution specifically requires a leading @ argument-file filename and control of the referenced text file containing additional Ghostscript arguments; the reported chain reproduces with the default -dSAFER invocation. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 14:43 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/a2… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 2.6.0, < 13.0.0
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CVE-2026-112898 (GCVE-0-2026-112898)
Vulnerability from nvd – Published: 2026-10-19 22:04 – Updated: 2026-10-28 15:15
VLAI
EPSS
VEX
Title
Pillow: Image.quantize() with empty palette leaks uninitialized stack memory
Summary
Pillow is a Python imaging library. From 9.1.0 until 13.0.0, Pillow can disclose uninitialized stack memory when Image.quantize() uses an empty palette. ImagingPaletteCacheUpdate() leaves a local cache array uninitialized when the palette has zero entries, and the conversion path emits those bytes as output pixel indices. An attacker who controls the palette image can obtain stack contents from a returned PNG or GIF. This can disclose addresses and stack-canary data without an out-of-bounds access, memory corruption, or process crash. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 15:15 UTC
CWE
- CWE-457 - Use of Uninitialized Variable
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/13… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 9.1.0, < 13.0.0
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CVE-2026-112897 (GCVE-0-2026-112897)
Vulnerability from nvd – Published: 2026-10-19 22:00 – Updated: 2026-10-22 21:13
VLAI
EPSS
VEX
Title
Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips
Summary
Pillow is a Python imaging library. From 5.3.0 until 13.0.0, Pillow can return uninitialized memory as pixels when libtiff performs a short decode of JPEG-compressed or Group 4 fax TIFF data. The _decodeStrip and _decodeTile buffers can be larger than the bytes written by libtiff, but Pillow converts the expected rows without clearing the unwritten tail. The tile path is affected from 5.3.0 and the strip path from 6.0.0. An attacker can supply a crafted TIFF to an application that loads and returns or re-encodes its pixels. This can disclose stale heap contents without memory corruption or a process crash. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-22 21:12 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/1d… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 5.3.0, < 13.0.0
|
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CVE-2026-112896 (GCVE-0-2026-112896)
Vulnerability from nvd – Published: 2026-10-19 21:59 – Updated: 2026-10-20 13:55
VLAI
EPSS
VEX
Title
Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read
Summary
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's TIFF encoder can read beyond a ColorMap buffer when retained TIFF metadata has a plane size inconsistent with BitsPerSample. A small TIFF can be opened normally and then retain a crafted ColorMap that is reused when the image is saved. An application that re-encodes the attacker's TIFF with libtiff can trigger the out-of-bounds read. This can disclose heap memory in the output or crash the process. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 13:55 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/d0… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-114501 (GCVE-0-2026-114501)
Vulnerability from cvelistv5 – Published: 2026-10-21 21:17 – Updated: 2026-10-30 16:10
VLAI
EPSS
VEX
Title
Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT > 1
Summary
Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from im->blocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user's pixels or other process memory to another user. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:09 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10172 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/19… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 11.2.1, < 13.0.0
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CVE-2026-96639 (GCVE-0-2026-96639)
Vulnerability from cvelistv5 – Published: 2026-10-21 21:06 – Updated: 2026-10-29 10:51
VLAI
EPSS
VEX
Title
Pillow multi-frame loaders can reuse stale native image storage after mode transitions
Summary
Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.load_prepare() reuses the stale native storage because _im is non-null without verifying that its mode and size still match. Crafted PSD, MPO, DCX, or MIC frame transitions can then write wider pixels into the narrow allocation, causing native out-of-bounds writes and crashes. The MPO path can also cause a native over-read and, in demonstrated runtime-specific profiles, command execution. This issue is fixed in version 13.0.0.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 10:51 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10105 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/78… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 11.0.0, < 13.0.0
|
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CVE-2026-96636 (GCVE-0-2026-96636)
Vulnerability from cvelistv5 – Published: 2026-10-21 21:05 – Updated: 2026-10-30 16:08
VLAI
EPSS
VEX
Title
Pillow: Decompression-bomb protection bypass via multi-frame seek() in MPO and DCX (MpoImageFile.seek / DcxImageFile.seek)
Summary
Pillow is a Python imaging library. Prior to 13.0.0, MpoImageFile.seek() and DcxImageFile.seek() reparse later MPO or DCX frames and replace self._size without rerunning Image._decompression_bomb_check(). A crafted multi-frame image can use a tiny first frame to pass Image.open() and then declare an over-limit later frame. Normal frame iteration through seek(), load(), or ImageSequence.Iterator can decode that frame and commit hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:08 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10011 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/f1… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96640 (GCVE-0-2026-96640)
Vulnerability from cvelistv5 – Published: 2026-10-21 21:03 – Updated: 2026-10-28 01:57
VLAI
EPSS
VEX
Title
Pillow PDF append accepts malformed shared page-tree DAG causing resource exhaustion
Summary
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, PdfParser.linearize_page_tree() in src/PIL/PdfParser.py treats a PDF /Pages graph as a tree without tracking duplicate indirect references. When Image.save(..., format="PDF", append=True) processes an attacker-controlled existing PDF whose /Kids arrays repeatedly reference the same child /Pages node, Pillow expands the shared subtree as distinct pages. A compact malformed PDF can therefore create exponentially many page references and consume disproportionate CPU before the append completes. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 01:56 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10093 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/6f… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 5.1.0, < 13.0.0
|
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CVE-2026-96637 (GCVE-0-2026-96637)
Vulnerability from cvelistv5 – Published: 2026-10-21 21:01 – Updated: 2026-10-23 21:18
VLAI
EPSS
VEX
Title
Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS
Summary
Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self._size without rerunning Image._decompression_bomb_check(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 17:32 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10076 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/7c… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96778 (GCVE-0-2026-96778)
Vulnerability from cvelistv5 – Published: 2026-10-21 20:58 – Updated: 2026-10-28 01:53
VLAI
EPSS
VEX
Title
Pillow: Heap buffer overflow writing JPEG comment after ICC profile fills buffer
Summary
Pillow is a Python imaging library. From 9.4.0 until 13.0.0, ImagingJpegEncode() in src/libImaging/JpegEncode.c can call jpeg_write_marker() for a JPEG COM comment when an ICC profile has exactly filled the 65536-byte encoder buffer. libjpeg writes one byte before checking the exhausted free_in_buffer counter, which then wraps and permits the attacker-controlled comment and subsequent compressed image data to overwrite adjacent heap memory. Re-saving an untrusted image as JPEG while preserving its ICC profile and forwarded comment can crash the process and may enable code execution in suitable runtime and heap layouts. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 01:52 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10124 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/02… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 9.4.0, < 13.0.0
|
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CVE-2026-96643 (GCVE-0-2026-96643)
Vulnerability from cvelistv5 – Published: 2026-10-21 20:56 – Updated: 2026-10-23 21:19
VLAI
EPSS
VEX
Title
Pillow: PNG eXIf chunk makes EXIF parsing run in quadratic time
Summary
Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load() in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new shrinking copy on every iteration and quadratic CPU work. The condition is reachable through Image.getexif(), Image._getexif(), and ImageOps.exif_transpose(), including common photo-upload rotation workflows. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 17:32 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10073 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/80… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 11.0.0, < 13.0.0
|
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CVE-2026-96644 (GCVE-0-2026-96644)
Vulnerability from cvelistv5 – Published: 2026-10-21 20:54 – Updated: 2026-10-28 18:22
VLAI
EPSS
VEX
Title
Pillow: Heap over-read in WMF/EMF rendering via 16-bit dimension truncation (Windows builds)
Summary
Pillow is a Python imaging library. Prior to 13.0.0 on Windows, src/PIL/WmfImagePlugin.py passes unchecked 32-bit WMF or EMF dimensions to the native drawwmf handler in src/display.c. The handler sizes a DIB allocation from 16-bit-truncated bcWidth and bcHeight fields but copies pixel data using the original full dimensions. A crafted wide, short metafile can pass the pixel-count decompression-bomb check and make the Windows-only renderer read beyond the heap buffer, potentially disclosing memory or crashing the process. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 18:22 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10120 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/4c… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96641 (GCVE-0-2026-96641)
Vulnerability from cvelistv5 – Published: 2026-10-21 20:51 – Updated: 2026-10-28 01:50
VLAI
EPSS
VEX
Title
Pillow: Reachable undefined behavior in native integer operations, potentially leading to denial of service or logic integrity compromise
Summary
Pillow is a Python imaging library. Prior to 13.0.0, PILfont text-width accumulation in src/_imaging.c checks positive glyph advances against INT_MAX but does not check negative advances against INT_MIN. Repeating a signed 16-bit advance of -32768 can therefore execute a signed C integer overflow in xsize += dx, producing a large positive width from a negative mathematical result. Applications that use getlength(), getsize(), or derived layout, quota, serialization, or allocation calculations can experience logic-integrity errors or resource consumption, while the high-level mask path commonly retains a decompression-bomb check. This issue is fixed in version 13.0.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 01:50 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10010 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/80… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96642 (GCVE-0-2026-96642)
Vulnerability from cvelistv5 – Published: 2026-10-21 20:49 – Updated: 2026-10-30 16:07
VLAI
EPSS
VEX
Title
Pillow: TarIO negative size field causes infinite CPU-spin loop
Summary
Pillow is a Python imaging library. Prior to 13.0.0, the TarIO initializer in src/PIL/TarIO.py accepts a negative octal member size and computes a backward seek that returns to the same 512-byte header. When the requested member name does not match, the parser repeatedly reads that header, consumes a full CPU core, and never returns. TarIO is reached only when an application directly uses PIL.TarIO.TarIO rather than the default Image.open() path. This issue is fixed in version 13.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:07 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10012 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/19… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 13.0.0
|
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CVE-2026-96638 (GCVE-0-2026-96638)
Vulnerability from cvelistv5 – Published: 2026-10-21 20:47 – Updated: 2026-10-28 18:21
VLAI
EPSS
VEX
Title
Pillow: BMP RLE decoder memory-amplification DoS via unbounded delta escape / absolute mode
Summary
Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 18:20 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/10015 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/e7… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 9.1.0, < 13.0.0
|
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