Common Weakness Enumeration

CWE-125

Allowed

Out-of-bounds Read

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product reads data past the end, or before the beginning, of the intended buffer.

12704 vulnerabilities reference this CWE, most recent first.

CVE-2026-107738 (GCVE-0-2026-107738)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:35 – Updated: 2026-10-08 22:35
VLAI
Title
SumatraPDF: Untrusted binary record offset used without lower-bound validation
Summary
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, ChmFile::GetCharZ() narrows file-controlled unsigned string offsets from /#WINDOWS and /#IVB to signed integers without a lower-bound check. An offset that becomes negative can make the function read before the /#STRINGS buffer, causing deterministic application termination. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.
Severity
6.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7580 records in the last 180 days details
References
Impacted products
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "sumatrapdf",
          "vendor": "sumatrapdfreader",
          "versions": [
            {
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              "version": "\u003c= 3.6.1"
            }
          ]
        }
      ],
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        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
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            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
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          }
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        "dateUpdated": "2026-10-08T22:35:30.475Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
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        {
          "name": "https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-33jg-vxm6-8mxx",
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          ],
          "url": "https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-33jg-vxm6-8mxx"
        },
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        "discovery": "UNKNOWN"
      },
      "title": "SumatraPDF: Untrusted binary record offset used without lower-bound validation"
    }
  },
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    "cveId": "CVE-2026-107738",
    "datePublished": "2026-10-08T22:35:30.475Z",
    "dateReserved": "2026-10-08T17:21:52.977Z",
    "dateUpdated": "2026-10-08T22:35:30.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-107731 (GCVE-0-2026-107731)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:20 – Updated: 2026-10-08 22:20
VLAI
Title
SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of service
Summary
SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, four independently reachable range-validation variants in src/LitDoc.cpp allow file-controlled offsets and sizes to overflow, narrow to negative values, or wrap before incomplete bounds checks. The affected calculations include contentOffset, the directory expression dirOff64 + dirLen64, and the decoded-section offset + size, along with secondary-header range handling. Opening a crafted LIT file that reaches one of these variants can cause invalid pointer reads and deterministic application termination. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7580 records in the last 180 days details
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Affected: <= 3.7.0.22298
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "sumatrapdf",
          "vendor": "sumatrapdfreader",
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        }
      ],
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            "attackVector": "LOCAL",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
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          ],
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        },
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}

CVE-2026-107729 (GCVE-0-2026-107729)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:18 – Updated: 2026-10-08 22:18
VLAI
Title
SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds read
Summary
SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, src/MobiDoc.cpp narrows the untrusted unsigned mobiHdr.hdrLen field to a signed integer for validation; values above INT_MAX become negative and bypass the upper-bound check. When the EXTH flag is set, the original unsigned value is reused as a pointer offset, causing DecodeExthHeader() to read beyond the record buffer. Opening a crafted MOBI file can reliably terminate the application with a native access violation; no code execution, information disclosure, or integrity impact has been demonstrated. No fixed version is available as of this review.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7580 records in the last 180 days details
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Affected: <= 3.7.0.22298
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "sumatrapdf",
          "vendor": "sumatrapdfreader",
          "versions": [
            {
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            }
          ]
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        }
      ],
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
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      },
      "references": [
        {
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          ],
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}

CVE-2026-107634 (GCVE-0-2026-107634)

Vulnerability from cvelistv5 – Published: 2026-10-08 14:10 – Updated: 2026-10-08 14:10
VLAI
Title
Dislocker through 0.7.3 Heap Out-of-Bounds Read via BitLocker Metadata Dataset Size
Summary
Dislocker through 0.7.3 contains a heap out-of-bounds read vulnerability in get_dataset() and get_next_datum() that never validate dataset and datum sizes against the metadata allocation. Attackers can craft a BitLocker volume image with inflated dataset or datum sizes that, when opened or mounted, crashes dislocker or discloses adjacent heap memory.
Severity
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 5285 records in the last 180 days details
References
Impacted products
Vendor Product Version
Aorimn dislocker Affected: 0 , ≤ 0.7.3 (custom)
Create a notification for this product.
Date Public
2026-08-31 00:00
Credits
Tristan Madani (@TristanInSec), Talence Security
Show details on NVD website
To clipboard 

{
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CVE-2026-107614 (GCVE-0-2026-107614)

Vulnerability from cvelistv5 – Published: 2026-10-08 13:39 – Updated: 2026-10-08 14:01
VLAI
Title
Integer underflow in TightVNC Server cursor shape trimming leads to out-of-bounds read
Summary
An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI capture path. The loop bound width - 1 wraps to 0xFFFFFFFF, producing an access roughly 4 GB beyond the 64 KB cursor buffer; a monochrome cursor of height 1 also becomes 0 because getCursorHeight() halves the height in place.
Severity
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 14:00 UTC
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
  • CWE-125 - Out-of-bounds Read
Assigner
securin CNA under the mitre root
CNA scorecard B 79/100 over 66 records in the last 180 days details
References
Impacted products
Vendor Product Version
GlavSoft TightVNC Affected: 0 , < 2.8.88 (custom)
Create a notification for this product.
Credits
Arjun Basnet from Securin
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-107614",
                "options": [
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                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-08T14:00:49.369592Z",
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          "value": "An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI capture path. The loop bound width - 1 wraps to 0xFFFFFFFF, producing an access roughly 4 GB beyond the 64 KB cursor buffer; a monochrome cursor of height 1 also becomes 0 because getCursorHeight() halves the height in place."
        }
      ],
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          ]
        },
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CVE-2026-107611 (GCVE-0-2026-107611)

Vulnerability from cvelistv5 – Published: 2026-10-08 13:39 – Updated: 2026-10-08 14:03
VLAI
Title
Out-of-bounds read in TightVNC Viewer ZRLE palette decoding
Summary
An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared palette size. readPaletteRleTile() and readPackedPaletteTile() use the attacker-supplied index to look up colours without validating it against the palette size; out-of-bounds heap data is copied into the framebuffer (garbled display) or the read faults, terminating the viewer.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 14:02 UTC
CWE
Assigner
securin CNA under the mitre root
CNA scorecard B 79/100 over 66 records in the last 180 days details
References
Impacted products
Vendor Product Version
GlavSoft TightVNC Affected: 0 , < 2.8.88 (custom)
Create a notification for this product.
Credits
Arjun Basnet from Securin
Show details on NVD website
To clipboard 

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CVE-2026-107302 (GCVE-0-2026-107302)

Vulnerability from cvelistv5 – Published: 2026-10-08 17:14 – Updated: 2026-10-08 17:32
VLAI
Title
msgpack5: Truncated map32 headers throw an unexpected error
Summary
msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the decoder reads the four-byte length of a map32 value before validating that the complete five-byte header is available. A truncated map32 header therefore causes a checked out-of-bounds buffer read and throws RangeError instead of IncompleteBufferError, which can unexpectedly terminate a request, stream, or worker in applications that wait for additional bytes after IncompleteBufferError. There is no adjacent-memory disclosure because the buffer implementation checks bounds. This issue is fixed in version 6.1.0.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 17:32 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7580 records in the last 180 days details
References
Impacted products
Vendor Product Version
mcollina msgpack5 Affected: < 6.1.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-107220 (GCVE-0-2026-107220)

Vulnerability from cvelistv5 – Published: 2026-10-07 18:37 – Updated: 2026-10-07 18:37
VLAI
Title
Excelize: Panic in cellInRange on a worksheet with an empty mergeCell ref
Summary
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.7.1 to 2.11.0, mergeCellsParser leaves the cached rectangle empty for an empty mergeCell ref and then passes that empty slice to cellInRange without a length check. GetCellValue reaches mergeCellsParser, which passes an empty rectangle derived from the mergeCell ref attribute into cellInRange. When a crafted worksheet contains an empty mergeCell ref and a non-streaming cell API reads the worksheet, cellInRange indexes four positions in an empty slice, allowing an attacker to panic on the first affected cell operation. No fixed version is available as of this review.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-129 - Improper Validation of Array Index
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7580 records in the last 180 days details
References
Impacted products
Vendor Product Version
qax-os excelize Affected: >= 2.7.1, <= 2.11.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-106574 (GCVE-0-2026-106574)

Vulnerability from cvelistv5 – Published: 2026-10-07 15:35 – Updated: 2026-10-07 16:17
VLAI
Title
ImageMagick: Heap Buffer Over-Write in distributed pixel cache server will result in a crash
Summary
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to 7.1.2-31, a client connected to the distributed pixel cache server can send crafted pixel data that triggers an integer-size calculation error and a heap buffer overwrite, crashing the server. This issue is fixed in version 7.1.2-31.
Severity
5.3 (Medium)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:17 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
  • CWE-125 - Out-of-bounds Read
  • CWE-131 - Incorrect Calculation of Buffer Size
  • CWE-190 - Integer Overflow or Wraparound
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7580 records in the last 180 days details
References
Impacted products
Vendor Product Version
ImageMagick ImageMagick Affected: < 7.1.2-31
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "vendor": "ImageMagick",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.1.2-31"
            }
          ]
        }
      ],
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          "lang": "en",
          "value": "ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to 7.1.2-31, a client connected to the distributed pixel cache server can send crafted pixel data that triggers an integer-size calculation error and a heap buffer overwrite, crashing the server. This issue is fixed in version 7.1.2-31."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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        {
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              "type": "CWE"
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        },
        {
          "descriptions": [
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              "cweId": "CWE-131",
              "description": "CWE-131: Incorrect Calculation of Buffer Size",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
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              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T15:35:22.337Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
          "name": "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-4fq9-vrx7-gv92",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-4fq9-vrx7-gv92"
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        "discovery": "UNKNOWN"
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      "title": "ImageMagick: Heap Buffer Over-Write in distributed pixel cache server will result in a crash"
    }
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    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-106574",
    "datePublished": "2026-10-07T15:35:22.337Z",
    "dateReserved": "2026-10-06T20:31:59.017Z",
    "dateUpdated": "2026-10-07T16:17:22.216Z",
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CVE-2026-106435 (GCVE-0-2026-106435)

Vulnerability from cvelistv5 – Published: 2026-10-08 20:12 – Updated: 2026-10-08 20:12
VLAI
Title
Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver
Summary
The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.
Severity
5.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.1 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
mongodb CNA under the mitre root
CNA scorecard C 70/100 over 197 records in the last 180 days details
References
Impacted products
Vendor Product Version
MongoDB Python Driver Affected: 0.10.3 , ≤ 4.18.2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.
Mitigation
Architecture and Design

Strategy: Language Selection

Use a language that provides appropriate memory abstractions.

CAPEC-540: Overread Buffers

An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

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