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TI-2026-68557 Aliases CVE-2026-96399

Denial of service in Gitea via external issue tracker regex

Priority LOW 39CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

Gitea through 1.27.3 is affected. A regular expression in a repository's external issue tracker settings can produce invalid slice indexes when Gitea renders issue references, causing an uncaught runtime panic (CWE-248) that terminates the Gitea process. A user who can edit a repository's external issue tracker settings can crash the instance for all users, because any later rendering of matching content, such as viewing a README, triggers the panic.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A repository's external issue tracker regular expression containing alternating capture groups could produce invalid slice indexes when Gitea rendered issue references, causing a runtime panic that terminated the Gitea process. A user who can edit a repository's external issue tracker settings could make any later rendering of matching content, such as viewing a README, crash the instance for all users.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0035 28th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
GiteaGiteaup to 1.27.3—No fix listedCNA
  • Gitea VendorGitea Affected up to 1.27.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*before 28.0.0VulnerableGitea
  • cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:* Versions before 28.0.0 Vulnerable ·Gitea

Remediation

The sources list no fixed version for Gitea.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-96399
  2. 2026-10-07 CVSS score added · CISA ADP
  3. 2026-10-07 CISA SSVC decision points changed

References

Patch 1

Advisory 1

Other 2

  • 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-2020-11072 The git hook feature in Gitea 1.1.0 through 1.12.5 might allow for authenticated remote… CVSS 3.1HIGH 7.2
  • TI-2022-12910 Gitea before 1.16.7 does not escape git fetch remote. CVSS 3.1HIGH 7.5
  • TI-2019-08404 models/repo_mirror.go in Gitea before 1.7.6 and 1.8.x before 1.8-RC3 mishandles mirror… CVSS 3.1HIGH 8.8
  • TI-2022-00955 Open Redirect on login in go-gitea/gitea CVSS 3.1MEDIUM 6.1
  • TI-2026-68968 Push-to-create bypass of FORCE_PRIVATE policy in Gitea CVSS 3.1MEDIUM 5.4
See all 80 →

Sources

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