Gitea up to 1.27.3 Repository Migration server-side request forgery

Summaryinfo

A vulnerability has been found in Gitea up to 1.27.3 and classified as critical. This affects an unknown part of the component Repository Migration. The manipulation leads to server-side request forgery. This vulnerability is referenced as CVE-2026-70357. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Gitea up to 1.27.3. This issue affects an unknown part of the component Repository Migration. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Gitea validates a repository migration hostname against its network allow and block lists before invoking Git, but the Git subprocess independently resolves the hostname when connecting. An attacker who can start a migration and control the destination's DNS can change the address between validation and connection to reach a blocked internal address. The affected path is the Git clone operation; validation in the migration HTTP client's dialer does not protect the independently connecting Git subprocess.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-70357 since 08/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/06/2026).

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

Version

• 1.27.0
• 1.27.1
• 1.27.2
• 1.27.3

License

• open-source

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