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Database

Improper resource allocation In python3.13

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Component
Affected version
Patched versions

1-10 of 20

10

Aliases

1. CVE-2026-42242. NVD-2026-42243. OSV-2026-42244. OSV-DEBIAN-2026-42245. OSV-ALPINE-2026-42246. GCVE-2026-42247. SECURITY-TRACKER-CVE-2026-42248. https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4224.json9. mail.python.org10. SECURITY-CVE-2026-4224

References

1. http://www.openwall.com/lists/oss-security/2026/03/16/42. https://github.com/python/cpython/issues/1459863. https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a4. https://github.com/python/cpython/commit/24ce88b285f56ee11626cf5e472af3cd8cc7c6215. https://github.com/python/cpython/commit/642865ddf4b232da1f3b1f7abcfa3254c4bfe7856. https://github.com/python/cpython/commit/af856a7177326ac25d9f66cc6dd28b554d914fee7. https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f38. https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf5327689. https://github.com/python/cpython/pull/145987

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