CVE-2026-112887

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 59/100
Published: 2026-11-01 Modified: 2026-11-06 First seen: 2026-11-01 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: Low
I: None
A: None

Description

Gitea Actions task tokens authenticate to the REST API as a shared system user with a negative ID, which repository, organization, project and key filters treated as having no owner restriction, and the token carried no API scope to restrict user-scoped routes. A user who can run a workflow could use the job's token with `GET /api/v1/user/repos` to list every repository on the instance, including private repositories of other users and organizations, with their metadata. Repository contents remained protected by per-repository permission checks. System users now own nothing, and `/api/v1/user` routes other than `GET /api/v1/user` accept only individual and bot accounts.

Affected Software (2)

VendorProductVersion
Gitea Gitea 0 < 28.3.0
Gitea Gitea 0 < 28.3.0

Bug Bounty Relevance

59 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

4.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.27%
Raw Score 0.002720
Percentile 19.8%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00272
2026-11-12
0.00272
2026-11-10
0.00272
2026-11-09
0.00272
2026-11-08
0.00272
2026-11-07
0.00272
2026-11-06
0.00185
2026-11-05
0.00185
2026-11-04
0.00185
2026-11-03
0.00185
2026-11-02
0.00185
2026-11-01
0.00185

Intelligence Sources

mitre ref →
nvd ref →