Ce mail provient de l'extérieur, restons vigilants ===================================================================== CERT-Renater Note d'Information No. 2026/VULN307 _____________________________________________________________________ DATE : 17/03/2026 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running CPython. ===================================================================== https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/ https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/ _____________________________________________________________________ [CVE-2026-4224] Stack overflow parsing XML with deeply nested DTD content models Stan Ulbrych 16 mars 2026 17:46 There is a HIGH severity vulnerability affecting CPython. 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. Please see the linked CVE ID for the latest information on affected versions: https://www.cve.org/CVERecord?id=CVE-2026-4224 https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf5... _____________________________________________________________________ [CVE-2026-3644] Incomplete control character validation in http.cookies Stan Ulbrych 16 mars 2026 17:28 There is a MEDIUM severity vulnerability affecting CPython. The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output(). Please see the linked CVE ID for the latest information on affected versions: https://www.cve.org/CVERecord?id=CVE-2026-3644 https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d4... -- Best regards, Stan Ulbrych. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================