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CVE-2026-20896

Gitea Docker image versions up to and including 1.26.2 use REVERSE_PROXY_TRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:77f77cd455761bf01df12589c860f18f6bf16f6a4815e262029194db4bd573f4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Gitea Open Source Git Server","vendor":"Gitea","versions":[{"lessThanOrEqual":"1.26.2","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-284","description":"CWE-284","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"Gitea v1.26.4 Release Blog Post","tags":["release-notes"],"url":"https://blog.gitea.com/release-of-1.26.3-and-1.26.4/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/references/3
{"name":"GitHub Pull Request #38151","tags":["patch"],"url":"https://github.com/go-gitea/gitea/pull/38151"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/references/1
{"name":"Gitea v1.26.3 Release","tags":["release-notes"],"url":"https://github.com/go-gitea/gitea/releases/tag/v1.26.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/references/2
{"name":"GitHub Security Advisory","tags":["vendor-advisory"],"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:041380ea3087e9755fb515db944c796f3f30eb88a15f13221d7baed7cff12585 · sha256:cff1117d24a82628… · /containers/adp/0/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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