How severe is CVE-2026-20904?

CVE-2026-20904 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-20904 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20904?

CVE-2026-20904 affects Gitea. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20904?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-20904 have an EU (EUVD) identifier?

Yes. CVE-2026-20904 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4262.

When was CVE-2026-20904 published?

CVE-2026-20904 was published on 2026-01-22 and last updated on 2026-06-17.

CVE-2026-20904

CVE-2026-20904 is a medium-severity vulnerability in Gitea with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4262
Weakness: CWE-284
Affected product: Gitea
Published: 2026-01-22
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-20904?: 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.
How severe is CVE-2026-20904?: CVE-2026-20904 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-20904 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20904?: CVE-2026-20904 affects Gitea. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20904?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20904 have an EU (EUVD) identifier?: Yes. CVE-2026-20904 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4262.
When was CVE-2026-20904 published?: CVE-2026-20904 was published on 2026-01-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gitea:gitea:*:*:*:*:*:-:*:*

More vulnerabilities in Gitea

CVE-2026-60004 — Critical (CVSS 9.8): Gitea before 1.27.1 allows remote code execution via the diffpatch API through Git hook installation.
CVE-2022-42968 — Critical (CVSS 9.8): Gitea before 1.17.3 does not sanitize and escape refs in the git backend. Arguments to git commands are mishandled.
CVE-2021-45331 — Critical (CVSS 9.8): An Authentication Bypass vulnerability exists in Gitea before 1.5.0, which could let a malicious user gain privileges.…
CVE-2021-45330 — Critical (CVSS 9.8): An issue exsits in Gitea through 1.15.7, which could let a malicious user gain privileges due to client side cookies…
CVE-2021-45327 — Critical (CVSS 9.8): Gitea before 1.11.2 is affected by Trusting HTTP Permission Methods on the Server Side when referencing the vulnerable…
CVE-2020-28991 — Critical (CVSS 9.8): Gitea 0.9.99 through 1.12.x before 1.12.6 does not prevent a git protocol path that specifies a TCP port number and…

All CVEs affecting Gitea →

Other CWE-284 (Improper Access Control) vulnerabilities

CVE-2026-83944 — Critical (CVSS 10.0): Improper access control in Azure Logic Apps allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-20192 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine…
CVE-2026-87230 — Critical (CVSS 10.0): Vulnerability in the Oracle Hyperion Financial Management product of Oracle Hyperion (component: Security). The…
CVE-2026-54745 — Critical (CVSS 10.0): Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.17.0,…
CVE-2026-18886 — Critical (CVSS 10.0): ServiceNow has remediated an improper access control vulnerability that was identified in the ServiceNow AI platform.…
CVE-2026-76607 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Missing ACL check in download element in Fabrik < 4.7.2.

Browse all CWE-284 (Improper Access Control) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

67.215.227.54 (ipv4-addr)
59.12.116.210 (ipv4-addr)
46.101.176.4 (ipv4-addr)
117.72.69.18 (ipv4-addr)
111.228.38.106 (ipv4-addr)
59.106.215.46 (ipv4-addr)
203.161.48.248 (ipv4-addr)
188.251.214.210 (ipv4-addr)