8.1

CVE-2026-55987: gitea gitea open source git server Incorrect Authorization

CVSS: 8.1v3.1HighDeferred
AliasesGHSA-vrhc-jjfc-m3m3GO-2026-6078
Published 13-08-2026Last modified 14-08-2026
Open JSON

Vulnerability summary

CVE-2026-55987 is a high (CVSS 8.1) Incorrect Authorization vulnerability in gitea gitea open source git server. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:21551-1SUSE-SU-2026:23216-1SUSE-SU-2026:23227-1

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 14-08-2026
    Last modifiedVulnerability information updated.

Description

OAuth2 sign-in reactivates an administrator-deactivated account on auth sources without refresh tokens (incomplete fix of #38009)

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

+0.12 pp

From 0.29% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.41%

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

Code.gitea.io1 product
  • gitea< 1.27.0
Gitea1 product
Go1 product
  • gitea.dev< 1.27.0

3 vendors · 3 products

References

4 links