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TI-2026-20845 Aliases CVE-2026-25779GHSA-j5r2-4c8j-xc3m

Gitea redirect handling permits open redirects through backslash paths

Priority MEDIUM 60CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

Gitea versions up to and including 1.25.4 allow redirect bypasses through raw or percent-encoded backslashes in redirect_to values.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00304 23rd percentileScored 2026-11-07
Fix Fixed github.com/go-gitea/gitea (Go): 1.26.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GiteaGitea Open Source Git Serverup to 1.25.4—No fix listedCNA
—github.com/go-gitea/gitea (Go)before 1.26.01.26.0Patch availableGHSA-j5r2-4c8j-xc3m
  • Gitea Open Source Git Server VendorGitea Affected up to 1.25.4 Fixed in — No fix listed CNA
  • github.com/go-gitea/gitea (Go) Vendor— Affected before 1.26.0 Fixed in 1.26.0 Patch available GHSA-j5r2-4c8j-xc3m

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*——Gitea
  • cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:* Versions — — ·Gitea

Remediation

  • Fix · GHSA-j5r2-4c8j-xc3m github.com/go-gitea/gitea (Go) Fixed in 1.26.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25779
  2. 2026-10-03 Alias added: GHSA-j5r2-4c8j-xc3m

References

Patch 2

Advisory 1

Other 3

  • TI-2026-42785 Gitea before 1.27.1 allows remote code execution via the diffpatch API through Git hook installation. KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-42033 Improper authorization on OAuth sign-in callback silently re-enables administrator-disabled accounts CVSS 3.1CRITICAL 9.8
  • TI-2026-40842 Privilege Escalation via Access Token Scope Escalation in API CVSS 3.1CRITICAL 9.8
  • TI-2026-16922 Gitea Docker image trusts spoofable reverse-proxy headers by default CVSS 3.1CRITICAL 9.8
  • TI-2026-42043 Team-repository linking endpoint bypasses the RepoAdminChangeTeamAccess organization setting CVSS 3.1CRITICAL 9.1
  • TI-2026-40381 OIDC userinfo Endpoint Returns Identity Claims Without Enforcing API Token Scopes CVSS 3.1CRITICAL 9.1
See all 240 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences