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PYSEC-2023-24
Vulnerability from pysec - Published: 2023-02-23 00:15 - Updated: 2023-05-04 03:49
VLAI
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Impacted products
| Name | purl | markdown-it-py | pkg:pypi/markdown-it-py |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "markdown-it-py",
"purl": "pkg:pypi/markdown-it-py"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
}
],
"repo": "https://github.com/executablebooks/markdown-it-py",
"type": "GIT"
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1.0",
"0.1.1",
"0.2.0",
"0.2.1",
"0.2.2",
"0.2.3",
"0.3.0",
"0.3.1",
"0.3.2",
"0.3.3",
"0.4.0",
"0.4.1",
"0.4.2",
"0.4.3",
"0.4.4",
"0.4.5",
"0.4.6",
"0.4.7",
"0.4.8",
"0.4.9",
"0.5.0",
"0.5.1",
"0.5.2",
"0.5.3",
"0.5.4",
"0.5.5",
"0.5.6",
"0.5.7",
"0.5.8",
"0.6.0",
"0.6.1",
"0.6.2",
"1.0.0",
"1.0.0b1",
"1.0.0b2",
"1.0.0b3",
"1.1.0",
"2.0.0",
"2.0.1",
"2.1.0"
]
}
],
"aliases": [
"CVE-2023-26303",
"GHSA-vrjv-mxr7-vjf8"
],
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "PYSEC-2023-24",
"modified": "2023-05-04T03:49:46.302314Z",
"published": "2023-02-23T00:15:00Z",
"references": [
{
"type": "FIX",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-vrjv-mxr7-vjf8"
}
]
}
BREW-TACH-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:42 – Updated: 2026-09-10 01:26 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "tach",
"purl": "pkg:brew/tach"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.35.0_4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-tach-CVE-2023-26303",
"modified": "2026-09-10T01:26:32Z",
"published": "2026-08-13T17:42:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-THEHARVESTER-CVE-20… (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:43 – Updated: 2026-09-10 01:28 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "theharvester",
"purl": "pkg:brew/theharvester"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.11.1_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-theharvester-CVE-2023-26303",
"modified": "2026-09-10T01:28:32Z",
"published": "2026-08-13T17:43:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-TORRRA-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:44 – Updated: 2026-09-10 01:31 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "torrra",
"purl": "pkg:brew/torrra"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-torrra-CVE-2023-26303",
"modified": "2026-09-10T01:31:20Z",
"published": "2026-08-13T17:44:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-TUBEUP-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:44 – Updated: 2026-09-10 01:31 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "tubeup",
"purl": "pkg:brew/tubeup"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.5.8_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-tubeup-CVE-2023-26303",
"modified": "2026-09-10T01:31:23Z",
"published": "2026-08-13T17:44:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-TWINE-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:44 – Updated: 2026-09-10 01:31 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "twine",
"purl": "pkg:brew/twine"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-twine-CVE-2023-26303",
"modified": "2026-09-10T01:31:48Z",
"published": "2026-08-13T17:44:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-VSVIEW-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:48 – Updated: 2026-09-10 01:35 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "vsview",
"purl": "pkg:brew/vsview"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.9.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-vsview-CVE-2023-26303",
"modified": "2026-09-10T01:35:36Z",
"published": "2026-08-13T17:48:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-WOOB-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:54 – Updated: 2026-09-10 01:41 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "woob",
"purl": "pkg:brew/woob"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7_9"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-woob-CVE-2023-26303",
"modified": "2026-09-10T01:41:06Z",
"published": "2026-08-13T17:54:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-WTFIS-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:54 – Updated: 2026-09-10 01:41 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "wtfis",
"purl": "pkg:brew/wtfis"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.15.0_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-wtfis-CVE-2023-26303",
"modified": "2026-09-10T01:41:07Z",
"published": "2026-08-13T17:54:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-YAMLFIX-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:54 – Updated: 2026-09-10 01:42 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "yamlfix",
"purl": "pkg:brew/yamlfix"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.19.1_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-yamlfix-CVE-2023-26303",
"modified": "2026-09-10T01:42:04Z",
"published": "2026-08-13T17:54:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-ZABBIX-CLI-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:55 – Updated: 2026-09-10 01:44 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "zabbix-cli",
"purl": "pkg:brew/zabbix-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-zabbix-cli-CVE-2023-26303",
"modified": "2026-09-10T01:44:55Z",
"published": "2026-08-13T17:55:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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