Gitea OpenID Discovery infinite loop

Summaryinfo

A vulnerability has been found in Gitea and classified as critical. This affects an unknown function of the component OpenID Discovery. The manipulation leads to infinite loop. This vulnerability is listed as CVE-2026-25946. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Gitea (the affected version unknown). This issue affects an unknown part of the component OpenID Discovery. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

When OpenID sign-in is enabled, Gitea accepts a user-supplied OpenID URL and performs discovery requests without validating the destination against internal network addresses. An unauthenticated remote attacker can cause the server to contact loopback or private-network HTTP services. This can expose internal service behavior and enable interaction with resources that are not directly reachable by the attacker.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-25946 since 02/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Gitea

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

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