Server-Side Request Forgery (SSRF) in Gitea - CVE-2026-22874
Published: June 22, 2026
Vulnerability identifier: #VU135011
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:L/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-22874
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: The Gitea Authors
Affected software:
Gitea
Gitea
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information from internal services via server-side request forgery.
The vulnerability exists due to server-side request forgery in the HostMatchList.checkIP allow-list filter when processing webhook delivery or repository migration destinations. A remote user can send a request to a specially crafted internal destination to disclose sensitive information from internal services via server-side request forgery.
Webhook delivery captures the response status, headers, and up to 1 MiB of response body and renders them in the webhook history UI, making the SSRF non-blind.
How to mitigate CVE-2026-22874
Install security update from vendor's website.