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TI-2026-74444 Aliases CVE-2026-82402

Open redirect in Gogs /redirect endpoint via backslash bypass

Priority MEDIUM 57CWE-601Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-601.

Summary

Gogs before 0.15.0+dev is affected in its /redirect endpoint and in similar post-action redirect flows. The IsSameSite check validates a normalized form of the target, but the redirect uses the original value, so a backslash bypasses the check (CWE-601). An unauthenticated remote attacker can make a link on the trusted Gogs domain send a victim to attacker-controlled content if the victim opens the link.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00435 38th percentileScored 2026-11-07
Fix Fixed gogs (gogs): 0.15.0+dev

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
Gogsgogsbefore 0.15.0+dev0.15.0+devPatch availableCNA
  • gogs VendorGogs Affected before 0.15.0+dev Fixed in 0.15.0+dev Patch available CNA

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

Upgrade Gogs to 0.15.0+dev, the version that fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA gogs (gogs) Fixed in 0.15.0+dev

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-82402
  2. 2026-10-20 CISA SSVC decision points changed
  3. 2026-10-20 Priority changed: LOW → MEDIUM

References

Other 4

  • 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