CVE-2026-20904 | Gitea: Broken access control in OpenID visibility toggle enables cross-user visibility changes

Gitea does not properly validate ownership when toggling OpenID URI visibility. An authenticated user may be able to change the visibility settings of other users' OpenID identities.

Published: 2026-01-22 Last update: 2026-01-29 Assigner: 88ee5874-cf24-4952-aea0-31affedb7ff2 Source: 88ee5874-cf24-4952-aea0-31affedb7ff2
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-20904 is rated Low Risk (27.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-20904

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-23 — 0.02% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-20904

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-20904

GitHub Security Advisory for CVE-2026-20904

GHSA-qqgv-v353-cv8p · Severity: medium · Ecosystem: go — Gitea does not properly validate ownership when toggling OpenID URI visibility

OS Trackers for CVE-2026-20904

vendor priority summary link
alpine — CVE-2026-20904: 1 source package rows (gitea); 44 state rows across 2 repos (3.23-community, edge-community); fixed 0, open 44. https://security.alpinelinux.org/vuln/CVE-2026-20904
redhat medium — https://access.redhat.com/security/cve/CVE-2026-20904

Affected software / configurations for CVE-2026-20904

Vendor Product Version Raw CPE
gitea gitea < 1.25.4 cpe:2.3:a:gitea:gitea:*:*:*:*:*:-:*:*

References for CVE-2026-20904

cvelogic Threat Intelligence