CVE-2026-101027
High
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.
SeverityHigh
CVSS7.7
Exploit probability—
Product
Gitea
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- gitea gitea28.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitea gitea | v < 28.0.0 | 28.0.0 |
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