CVE-2026-3644
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and u
CVSS
7.5
Alto
EPSS
0.4%
p34
KEV
—
Exploit Today
10
0-100
Publicado: 16 mar 2026 · Última mod.: 30 jun 2026 · CWE-20 · CWE-116
0.4%EPSS · 30 días0.4%
2026-06-302026-07-19
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().
- github.comhttps://github.com/python/cpython/commit/556aa098e738b127c714866f819b4abe2f7593d8
- github.comhttps://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4
- github.comhttps://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590dd
- github.comhttps://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979dd
- github.comhttps://github.com/python/cpython/commit/dae4b1a21f8df4570e30986affd61bbe4ade4cef
- github.comhttps://github.com/python/cpython/issues/145599
- github.comhttps://github.com/python/cpython/pull/145600
- mail.python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/
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