CVE-2026-101027
Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
CVE-2026-101027 is a high vulnerability (CVSS 7.7) in Gitea, published October 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.23%, the 14th percentile. Fixed in gitea 28.0.0.
- Severity
- 7.7 HighCVSS 3.1, CVE List
- Exploit chance
- 0.23%EPSS, 14th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
28.0.0gitea
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
giteaBitnami | before 28.0.0 | 28.0.0 |
What each source reports
CVE List Score used
Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
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.
- Record
CVE-2026-101027- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
EUVDEUVD-2026-93908
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.
- Record
EUVD-2026-93908- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-101027- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
OSV
Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
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.
- Record
CVE-2026-101027- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-02
OSVBIT-gitea-2026-101027No score
Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
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.
- Record
BIT-gitea-2026-101027- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.