High 7.7Published Oct 6, 2026

CVE-2026-101027Gitea migration SSRF through ALLOWED_DOMAINS address check bypass

Updated under an hour ago (2026-10-19 06:50 UTC)

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It affects Gitea. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.17%, higher than 6% of scored CVEs.

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Exploited in the last 30 days

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.

CVSS: 7.7 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-346
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.17% (percentile 6)
Assigned by: Gitea
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Gitea Gitea gitea:gitea (from the name)	through 1.27.3	CNA record
gitea gitea gitea:gitea	before 28.0.0	NVD

References

https://github.com/go-gitea/gitea/security/advisories/GHSA-fqjr-23c8-gg9mvendor-advisory, mitigation
https://github.com/go-gitea/gitea/pull/39426patch
https://blog.gitea.com/release-of-28.0.0/release-notes
https://github.com/go-gitea/gitea/releases/tag/v28.0.0release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.