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Threatist priority CRITICAL 0 HIGH 0 MEDIUM 0 LOW 2

Signals Exploited in the wild (KEV) 0 Patch available 2 No fix listed 0 Has CVE 2

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Weakness (CWE) CWE-116 Improper Encoding or Escaping of Output 1 CWE-20 Improper Input Validation 1 CWE-674 Uncontrolled Recursion 1

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Release: Python Software Foundation CPython 3.10.21, 3.11.16 and 4 more versions × Clear all filters

TI-2026-03671 CVE-2026-4224 · GHSA-h46w-ffvp-4pw5

Stack overflow parsing XML with deeply nested DTD content models

Priority LOW 28

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.

CVSS 4.0MEDIUM 6.0· Network · Low privileges · No interaction · EPSS 0.00717 · Published 2026-03-16 · Partial fix · 3.10.21, 3.11.16 +4 CWE-674

TI-2026-03144 CVE-2026-3644 · GHSA-vf33-88pf-hwp3

Incomplete control character validation in http.cookies

Priority LOW 27

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete.

CVSS 4.0MEDIUM 6.0· Network · Low privileges · No interaction · EPSS 0.00508 · Published 2026-03-16 · Partial fix · 3.10.21, 3.11.16 +4 CWE-116

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