4.3

CVE-2026-20888: gitea Improper Access Control

CVSS: 4.3v3.1MediumAnalyzed
AliasesGHSA-9cgq-wp42-4rpqBIT-gitea-2026-20888GHSA-ccq9-c5hv-cf64
Published 22-01-2026Last modified 23-01-2026
Open JSON

Vulnerability summary

CVE-2026-20888 is a medium (CVSS 4.3) Improper Access Control vulnerability in gitea. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.5% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0403-1

Timeline

  1. 22-01-2026
    PublishedVulnerability first disclosed.
  2. 23-01-2026
    Last modifiedVulnerability information updated.

Description

Gitea does not properly verify authorization when canceling scheduled auto-merges via the web interface. A user with read access to pull requests may be able to cancel auto-merges scheduled by other users.

CVSS metrics

3 scores · 3 sources · 2 versions

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

+0.01 pp

From 0.32% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Gitea2 products
Code.gitea.io1 product
  • gitea< 1.25.4
Github.com/go-gitea1 product
  • gitea< 1.25.4

3 vendors · 4 products

References

9 links