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CVE-2026-24408

sigstore-python is a Python tool for generating and verifying Sigstore signatures. Prior to version 4.2.0, the sigstore-python OAuth authentication flow is susceptible to Cross-Site Request Forgery. `_OAuthSession` creates a unique "state" and sends it as a parameter in the authentication request but the "state" in the server response seems not not be cross-checked with this value. Version 4.2.0 contains a patch for the issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:214eb3f86488ee5e07865472ad8025483df2b022ec2d3dccdcf7ce56c350e6a0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"sigstore-python","vendor":"sigstore","versions":[{"status":"affected","version":"< 4.2.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c6ffd950b91d91450e812437cd9e1a654190d413a520f17fa4d3bb95ad330858 · sha256:768a8449f4654b5b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":0,"baseSeverity":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c6ffd950b91d91450e812437cd9e1a654190d413a520f17fa4d3bb95ad330858 · sha256:768a8449f4654b5b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-352","description":"CWE-352: Cross-Site Request Forgery (CSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c6ffd950b91d91450e812437cd9e1a654190d413a520f17fa4d3bb95ad330858 · sha256:768a8449f4654b5b… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c6ffd950b91d91450e812437cd9e1a654190d413a520f17fa4d3bb95ad330858 · sha256:768a8449f4654b5b… · /containers/cna/references/1
{"name":"https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c6ffd950b91d91450e812437cd9e1a654190d413a520f17fa4d3bb95ad330858 · sha256:768a8449f4654b5b… · /containers/cna/references/2
{"name":"https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c6ffd950b91d91450e812437cd9e1a654190d413a520f17fa4d3bb95ad330858 · sha256:768a8449f4654b5b… · /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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