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

Quick assessment

Affected
Gitea Gitea
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

当配置了 时，系统会接受与允许列表匹配的域名，而不会检查其解析后的地址是否符合本地网络限制条件。攻击者若能启动仓库迁移，并控制某个允许域名的 DNS 解析，便可将其解析为回环地址（loopback）或私有地址，从而绕过 的安全限制，从 Gitea 服务器访问内部服务。未配置 的实例不受此特定绕过漏洞的影响。

AI Predicted 7.4 Difficulty: Moderate

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gitea Gitea ≤ 1.27.3 affected
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I. Basic Information for CVE-2026-101027

Vulnerability Information
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Vulnerability Title
Gitea migration SSRF through ALLOWED_DOMAINS address check bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gitea Gitea 0 ~ 1.27.3 -

II. Public POCs for CVE-2026-101027

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III. Intelligence Information for CVE-2026-101027

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Other References for CVE-2026-101027 (4)

Same Patch Batch · Gitea · 2026-10-06 · 21 CVEs total

CVE-2026-104632 Gitea fork workflow approval bypass through cancel and rerun
CVE-2026-73278 Gitea WebAuthn bypass during OAuth and OIDC sign-in
CVE-2026-79960 Gitea deploy key pushes acting as the repository owner
CVE-2026-70357 Gitea repository migration SSRF through DNS rebinding
CVE-2026-96580 Gitea Actions memory exhaustion through large static matrices
CVE-2026-96589 Gitea private repository access retained after rejected transfer
CVE-2026-96400 Gitea migration SSRF to reserved addresses through ALLOWED_DOMAINS
CVE-2026-96399 Gitea denial of service through external issue tracker patterns
CVE-2026-96404 Gitea installer authentication bypass for existing accounts
CVE-2026-104626 Gitea fork workflow job revival through later approval
CVE-2026-94205 Gitea fork workflow approval bypass through maintainer-triggered events
CVE-2026-104636 Gitea SSRF through Git HTTP redirects in mirrors and fetches
CVE-2026-101029 Gitea migration and pull mirror SSRF through multi-answer DNS
CVE-2026-95106 Gitea review and execution mismatch through duplicate tree entries
CVE-2026-95112 Gitea issue reference parsing CPU exhaustion
CVE-2026-89430 Gitea push mirror SSRF and forced writes to internal Git hosts
CVE-2026-103504 Gitea API team demotion not applied to unit permissions
CVE-2026-103667 Gitea container registry stored XSS through blob media type
CVE-2026-103059 Gitea built-in SSH server authentication bypass through key case folding
CVE-2026-103670 Gitea trusted workflow cancellation by unapproved fork runs

IV. Related Vulnerabilities

Same product: Gitea
Same vendor: Gitea

V. Comments for CVE-2026-101027

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