CVE-2026-82402

Gogs is an open source self-hosted Git service. Prior to 0.15.0+dev, an unauthenticated attacker can provide a backslash-containing target to the /redirect endpoint, and similar post-action redirect flows are also affected. internal/urlx/urlx.go IsSameSite validates a normalized form of the target while cmd/gogs/internal/web/web.go getRedirect and other callers use the original value in the Location response. This backslash normalization mismatch lets browsers interpret the Location value as a scheme-relative external URL, allowing links on a trusted Gogs domain to redirect victims to attacker-controlled content for phishing. This vulnerability is fixed in 0.15.0+dev.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-601

Published

2026-10-14

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

References

• https://github.com/gogs/gogs/blob/main/CHANGELOG.md#0150dev-main
• https://github.com/gogs/gogs/commit/0aa820e6d572771551871c0b5f5f32dffc565e3e
• https://github.com/gogs/gogs/pull/8391
• https://github.com/gogs/gogs/security/advisories/GHSA-3g28-2vwg-gxq6
• https://github.com/gogs/gogs/security/advisories/GHSA-3g28-2vwg-gxq6

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