PatchTheCVECVE-2026-101027: When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without ch
CVE-2026-101027 is a high-severity flaw (CVSS 7.7) affecting gitea. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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` con
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.7 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 86%) |
| CISA exploited list | No |
| Weakness | CWE-346 |
| Published | 2026-10-06 |
| Last modified | 2026-10-15 |
Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-101027?
gitea: upgrade to 28.0.0. Exact commands for each OS are on this page.
Is CVE-2026-101027 being exploited?
CVE-2026-101027 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-101027 affect?
CVE-2026-101027 affects gitea. Severity is high (CVSS 7.7). 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
How urgent is CVE-2026-101027?
Priority 30/100. High severity
Software pages
Related CVEs
- CVE-2026-101029 MEDIUM 4.3 UPGRADE Gitea's repository migration and pull mirror egress checks could be bypassed with a hostname that returns mult
- CVE-2026-103059 CRITICAL 9.1 UPGRADE When Gitea's built-in SSH server is enabled (`START_SSH_SERVER = true`), the presented public key was looked u
- CVE-2026-103667 MEDIUM 5.4 UPGRADE Gitea's container registry served blob downloads with a `Content-Type` taken from the media type declared in p
- CVE-2026-103670 HIGH 7.5 UPGRADE When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled
- CVE-2026-86684 HIGH 7.1 UPGRADE The Gitea push mirror API checked whether the repository owner, instead of the requesting user, may use local