VDB
GHSA-h46w-ffvp-4pw5
GHSA-h46w-ffvp-4pw5
PUBLISHED
CVSS 6 MEDIUM
When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.
Risk Scores
CVSS v4.0
6
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Timeline
- Mar 16, 2026 CVE Published
- Apr 8, 2026 CVE Updated
- Apr 10, 2026 Security Advisory
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-4224 advisory
- https://github.com/python/cpython/issues/145986 url
- https://github.com/python/cpython/pull/145987 url
- https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a url
- https://github.com/python/cpython/commit/642865ddf4b232da1f3b1f7abcfa3254c4bfe785 url
- https://github.com/python/cpython/commit/af856a7177326ac25d9f66cc6dd28b554d914fee url
- https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3 url
- https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768 url
- https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R url
- http://www.openwall.com/lists/oss-security/2026/03/16/4 url