---
id: CVE-2026-101027
title: >-
  When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the
  allow list was accepted without checking its resolved address against the
  local-network restrictions
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 …
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-346
vendor: gitea
product: gitea
affected:
  - gitea < 28.0.0
patched:
  - gitea 28.0.0
published: '2026-10-06'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:32:39.673'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101027'
references:
  - url: 'https://blog.gitea.com/release-of-28.0.0/'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/pull/39426'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/releases/tag/v28.0.0'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/security/advisories/GHSA-fqjr-23c8-gg9m'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
tags:
  - nvd
  - cve.org
epss: 0.00233
epssPercentile: 0.14092
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T11:37:40.968109Z'
ingestedAt: '2026-10-06T20:16:42.499Z'
---

## Overview

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.

## Affected

- `gitea < 28.0.0`

## Remediation

Upgrade past the affected range:

- `gitea 28.0.0`