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CVE-2026-3644

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().
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:74b4b338977b4288df20de683e9cb87eb5c429ca2a353b4e631e1d3f466a480e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-116","description":"CWE-116 Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/adp/0/problemTypes/1/descriptions/0

{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","modules":["http.cookies"],"product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.13.13","status":"affected","version":"0","versionType":"python"},{"lessThan":"3.14.4","status":"affected","version":"3.14.0","versionType":"python"},{"lessThan":"3.15.0a8","status":"affected","version":"3.15.0a1","versionType":"python"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-116","description":"CWE-116 Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/adp/0/problemTypes/1/descriptions/0
{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/556aa098e738b127c714866f819b4abe2f7593d8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/6
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590dd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979dd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/dae4b1a21f8df4570e30986affd61bbe4ade4cef"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/7
{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/145599"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/python/cpython/pull/145600"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/3
{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9eda4a360ef0e9a1b110fbd90225fc1842353696a5a3bc49a73f837f0588e3f6 · sha256:dcab51f5420ba3ea… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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