CVE-2026-20896

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Source
https://cve.org/CVERecord?id=CVE-2026-20896
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-20896.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-20896
Aliases
Downstream
Related
Published
2026-07-03T20:19:29.588Z
Modified
2026-08-04T11:50:45.612711878Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Gitea Docker image trusts spoofable reverse-proxy headers by default
Details

Gitea Docker image versions up to and including 1.26.2 use REVERSEPROXYTRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled.

Database specific 
{
    "cwe_ids": [
        "CWE-284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/20xxx/CVE-2026-20896.json",
    "cna_assigner": "Gitea"
}
References

Affected packages

Git / github.com/go-gitea/gitea

Affected ranges

Type
GIT
Repo
https://github.com/go-gitea/gitea
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
2c749ce548b1da0a52835861a87b888e67842d29
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.26.2"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.9.99
v1.*
v1.0.0
v1.1.0
v1.10.0-dev
v1.10.0-rc1
v1.10.5
v1.11.0-dev
v1.11.0-rc1
v1.12.0-dev
v1.13.0-dev
v1.14.0-dev
v1.15.0-dev
v1.15.0-rc1
v1.16.0-dev
v1.16.0-rc1
v1.17.0-dev
v1.18.0-dev
v1.18.0-rc0
v1.19.0-dev
v1.19.0-rc0
v1.20.0-dev
v1.20.0-rc0
v1.21.0-dev
v1.21.0-rc0
v1.22.0-dev
v1.22.0-rc0
v1.22.0-rc1
v1.23.0-dev
v1.24.0-dev
v1.25.0-dev
v1.26.0
v1.26.0-dev
v1.26.0-rc0
v1.26.1
v1.26.2
v1.27.0-dev
v1.5.0-dev
v1.5.0-rc1
v1.6.0-dev
v1.6.0-rc1
v1.7.0-dev
v1.9.0-dev
v1.9.0-rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-20896.json"