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CVE-2026-70357: Gitea repository migration SSRF through DNS rebinding

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-13
• Weakness: CWE-918

Description

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.

Affected products

• Gitea Open Source Git Server: before 28.0.0 — fixed in 28.0.0

How to fix

Upgrade to a fixed version: Gitea Open Source Git Server 28.0.0. Check the vendor advisory for mitigations.

References

• https://blog.gitea.com/release-of-28.0.0/
• https://github.com/go-gitea/gitea/pull/39426
• https://github.com/go-gitea/gitea/releases/tag/v28.0.0
• https://github.com/go-gitea/gitea/security/advisories/GHSA-p3pc-g8m5-hrrr

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