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TI-2026-20282 Aliases CVE-2026-25119GHSA-w6j9-vw59-27wv

Gogs: Authentication Bypass via Unvalidated Reverse Proxy Headers

Priority HIGH 75CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-290.

Summary

Gogs is an open source self-hosted Git service. Prior to 0.14.3, when ENABLE_REVERSE_PROXY_AUTHENTICATION is enabled, Gogs accepts the configured authentication header (default: X-WEBAUTH-USER) directly from client requests without validating that the request originated from a trusted reverse proxy. Any remote attacker who can reach the Gogs service can forge this header to impersonate any user or trigger automatic account creation, completely bypassing authentication. This vulnerability is fixed in 0.14.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00863 58th percentileScored 2026-11-07
Fix Fixed gogs (gogs): 0.14.3gogs.io/gogs (Go): 0.14.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Gogsgogsbefore 0.14.30.14.3Patch availableCNA
—gogs.io/gogs (Go)before 0.14.30.14.3Patch availableGHSA-w6j9-vw59-27wv
  • gogs VendorGogs Affected before 0.14.3 Fixed in 0.14.3 Patch available CNA
  • gogs.io/gogs (Go) Vendor— Affected before 0.14.3 Fixed in 0.14.3 Patch available GHSA-w6j9-vw59-27wv

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
cpe:2.3:a:gogs:gogs:*:*:*:*:*:*:*:*——Gogs
  • cpe:2.3:a:gogs:gogs:*:*:*:*:*:*:*:* Versions — — ·Gogs

Remediation

  • Fix · CNA gogs (gogs) Fixed in 0.14.3
  • Fix · GHSA-w6j9-vw59-27wv gogs.io/gogs (Go) Fixed in 0.14.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25119
  2. 2026-10-03 Alias added: GHSA-w6j9-vw59-27wv

References

Advisory 1

Other 5

  • TI-2025-07419 File overwrite in file update API in Gogs KEVCVSS 4.0HIGH 8.7
  • TI-2022-01876 OS Command Injection in gogs/gogs CVSS 3.1CRITICAL 9.8
  • TI-2024-36988 Gogs has a Path Traversal in file update API CVSS 4.0HIGH 8.7
  • TI-2026-37922 Gogs: Path Traversal in organization name results in RCE through Git hooks CVSS 3.1CRITICAL 10.0
  • TI-2022-01744 Remote Command Execution in gogs/gogs CVSS 3.1CRITICAL 10.0
  • TI-2025-39562 Gogs's update .git/config file allows remote command execution CVSS 4.0CRITICAL 9.3
See all 75 →

Sources

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