Gitea up to 1.27.3 SSH Authentication sql injection

Summaryinfo

A vulnerability was found in Gitea up to 1.27.3 and classified as critical. The affected element is an unknown function of the component SSH Authentication. Such manipulation leads to sql injection. This vulnerability is referenced as CVE-2026-103059. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Gitea up to 1.27.3. It has been rated as critical. Affected by this issue is an unknown code of the component SSH Authentication. The manipulation with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

When Gitea's built-in SSH server is enabled (`START_SSH_SERVER = true`), the presented public key was looked up with an SQL `LIKE` comparison of its encoded content, which is case-insensitive on some databases, including the default SQLite. An attacker who can construct a case variant of another user's registered RSA public key for which they can derive the private key could have that key matched to the victim's account and authenticate over SSH as that user. Keys are now looked up by fingerprint.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-103059 since 10/04/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/06/2026). This vulnerability is assigned to T1505 by the MITRE ATT&CK project.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Gitea

Version

• 1.27.0
• 1.27.1
• 1.27.2
• 1.27.3

License

• open-source

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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