PatchSiren cyber security CVE debrief
CVE-2026-34966 Gitea CVE debrief
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T21:16:58.187Z and has not been modified since then. Gitea versions prior to 1.27.0 contain a server-side request forgery (SSRF) vulnerability that allows authenticated attackers to bypass SSRF protections. The vulnerability is exploited through HTTP fetch operations in migration and OAuth avatar code paths that use Go's default http.Get without a custom DialContext. Attackers can supply arbitrary URLs through release asset download URLs, pull-request patch URLs, or OAuth avatar endpoints to reach internal services, cloud instance-metadata endpoints, or read local files such as the application configuration containing database credentials and signing secrets, with exfiltrated content persisted as migration release assets for later retrieval. The vulnerability has a CVSS score of 8.3 and is considered HIGH severity. Administrators and security teams responsible for Gitea instances, especially those hosting internal services or using Gitea for CI/CD pipelines, should be aware of this vulnerability. Additionally, developers and DevOps teams working with Gitea should prioritize patching or mitigating this vulnerability to prevent potential SSRF attacks.
- Vendor
- Gitea
- Product
- Unknown
- CVSS
- HIGH 8.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-08-05
- Original CVE updated
- 2026-08-05
- Advisory published
- 2026-08-05
- Advisory updated
- 2026-08-05
Who should care
Administrators and security teams responsible for Gitea instances, especially those hosting internal services or using Gitea for CI/CD pipelines, should be aware of this vulnerability. Additionally, developers and DevOps teams working with Gitea should prioritize patching or mitigating this vulnerability to prevent potential SSRF attacks.
Technical summary
Gitea versions prior to 1.27.0 contain a server-side request forgery (SSRF) vulnerability that allows authenticated attackers to bypass SSRF protections. The vulnerability is exploited through HTTP fetch operations in migration and OAuth avatar code paths that use Go's default http.Get without a custom DialContext. Attackers can supply arbitrary URLs through release asset download URLs, pull-request patch URLs, or OAuth avatar endpoints to reach internal services, cloud instance-metadata endpoints, or read local files such as the application configuration containing database credentials and signing secrets, with exfiltrated content persisted as migration release assets for later retrieval.
Defensive priority
Authenticated attackers can bypass SSRF protections in Gitea prior to 1.27.0, allowing access to internal services, cloud instance-metadata endpoints, or local files.
Recommended defensive actions
- Inventory Gitea instances to identify those running versions prior to 1.27.0.
- Apply the vendor-provided patch or upgrade to Gitea version 1.27.0 or later.
- Monitor Gitea instance logs for suspicious activity indicative of SSRF exploitation attempts.
- Implement compensating controls such as network access restrictions and web application firewalls.
- Verify and rotate sensitive credentials and secrets stored in Gitea instances.
Evidence notes
The CVE-2026-34966 record indicates a server-side request forgery vulnerability in Gitea prior to 1.27.0. Authenticated attackers can bypass SSRF protections by exploiting HTTP fetch operations in migration and OAuth avatar code paths. The vulnerability allows access to internal services, cloud instance-metadata endpoints, or local files such as application configuration containing database credentials and signing secrets.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T21:16:58.187Z and has not been modified since then.