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().
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Advisories
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Fixes
Solution
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Workaround
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References
History
Mon, 16 Mar 2026 18:15:00 +0000
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Mon, 16 Mar 2026 17:45:00 +0000
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| Description | 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(). | |
| Title | Incomplete control character validation in http.cookies | |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: PSF
Published:
Updated: 2026-03-16T18:25:55.021Z
Reserved: 2026-03-06T16:13:09.289Z
Link: CVE-2026-3644
No data.
Status : Received
Published: 2026-03-16T18:16:09.907
Modified: 2026-03-16T18:16:09.907
Link: CVE-2026-3644
No data.
OpenCVE Enrichment
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Weaknesses
No weakness.