CVEvulnerability
CVE-2026-4224
6.0 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-03-16
- Last modified
- 2026-08-13
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 6.0 MEDIUM — 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
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-674
Description
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.
Affected configurations
• python python (< 3.10.0)
• python python (>= 3.13.0 < 3.13.13)
• python python (>= 3.14.0 < 3.14.4)
• python python 3.15.0
Related
Weakness · CWE (1)
- CWE-674 Uncontrolled Recursion weakness
References
- https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a Patch
- https://github.com/python/cpython/commit/24ce88b285f56ee11626cf5e472af3cd8cc7c621 github.com
- https://github.com/python/cpython/commit/642865ddf4b232da1f3b1f7abcfa3254c4bfe785 Patch
- https://github.com/python/cpython/commit/af856a7177326ac25d9f66cc6dd28b554d914fee Patch
- https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3 Patch
- https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768 Patch
- https://github.com/python/cpython/issues/145986 Issue Tracking
- https://github.com/python/cpython/pull/145987 Patch
- https://mail.python.org/archives/list/[email protected]/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/ Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/03/16/4 Mailing List, Third Party Advisory