CVE-2026-101027 json
Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
published 2026-10-06 33 d ago modified 2026-10-16 23 d ago also BIT-gitea-2026-101027 , EUVD-2026-93908 , GHSA-fqjr-23c8-gg9m
- cvss
- 7.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami gitea 28.0.0
- gitea gitea 28.0.0
- github.com/go-gitea/gitea#39426 pull request
- github.com/go-gitea/gitea/releases/tag/v28.0.0 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 32 d ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| CNA | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| OSV | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitea | <28.0.0 |
28.0.0 |
Affected products
- Gitea Gitea
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/go-gitea/gitea/pull/39426
patch
-
github.com
/go-gitea/gitea/security/advisories/GHSA-fqjr-23c8-gg9m
vendor-advisory, mitigation, advisory
-
blog.gitea.com
/release-of-28.0.0/
release-notes, article
-
github.com
/go-gitea/gitea/releases/tag/v28.0.0
release-notes, article
-
nvd.nist.gov
/vuln/detail/CVE-2026-101027
web
Sources
- CVE List CVE-2026-101027
- NVD CVE-2026-101027
- OSV BIT-gitea-2026-101027
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