How severe is CVE-2026-20800?

CVE-2026-20800 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 high, integrity none, and availability none.

Is CVE-2026-20800 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20800?

CVE-2026-20800 affects Gitea. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20800?

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

Does CVE-2026-20800 have an EU (EUVD) identifier?

Yes. CVE-2026-20800 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4268.

When was CVE-2026-20800 published?

CVE-2026-20800 was published on 2026-01-22 and last updated on 2026-06-17.

CVE-2026-20800

CVE-2026-20800 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4268
Weakness: CWE-200
Affected product: Gitea
Published: 2026-01-22
Last modified: 2026-06-17

Description

Gitea's notification API does not re-validate repository access permissions when returning notification details. After a user's access to a private repository is revoked, they may still view issue and pull request titles through previously received notifications.

Frequently asked questions

What is CVE-2026-20800?: Gitea's notification API does not re-validate repository access permissions when returning notification details. After a user's access to a private repository is revoked, they may still view issue and pull request titles through previously received notifications.
How severe is CVE-2026-20800?: CVE-2026-20800 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 high, integrity none, and availability none.
Is CVE-2026-20800 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20800?: CVE-2026-20800 affects Gitea. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20800?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20800 have an EU (EUVD) identifier?: Yes. CVE-2026-20800 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4268.
When was CVE-2026-20800 published?: CVE-2026-20800 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-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…
CVE-2019-11576 — Critical (CVSS 9.8): Gitea before 1.8.0 allows 1FA for user accounts that have completed 2FA enrollment. If a user's credentials are known,…

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