Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
Summary
| CVE | CVE-2026-101027 |
|---|---|
| State | PUBLISHED |
| Assigner | Gitea |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-06 20:17:08 UTC |
| Updated | 2026-10-06 20:17:08 UTC |
| Description | When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions. A user who can start repository migrations and control the DNS of an allowed hostname could make it resolve to loopback or private addresses and bypass `ALLOW_LOCALNETWORKS = false`, reaching internal services from the Gitea server. Instances without `ALLOWED_DOMAINS` configured are not affected by this specific bypass. |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/go-gitea/gitea/releases/tag/v28.0.0 | 88ee5874-cf24-4952-aea0-31affedb7ff2 | github.com | |
| github.com/go-gitea/gitea/pull/39426 | 88ee5874-cf24-4952-aea0-31affedb7ff2 | github.com | |
| blog.gitea.com/release-of-28.0.0 | 88ee5874-cf24-4952-aea0-31affedb7ff2 | blog.gitea.com | |
| github.com/go-gitea/gitea/security/advisories/GHSA-fqjr-23c8-gg9m | 88ee5874-cf24-4952-aea0-31affedb7ff2 | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: https://github.com/Razzlemouse (en)
CNA: https://github.com/TheFox0x7 (en)
CNA: https://github.com/silverwind (en)
CNA: https://github.com/bircni (en)
CNA: https://github.com/wxiaoguang (en)
There are currently no legacy QID mappings associated with this CVE.