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CVE-2026-104627— Gitea OpenID account linking without session binding

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.

Gitea 安全设置中的 OpenID 关联回调在接收 OpenID 2.0 断言时，未验证当前已登录用户是否主动发起了该关联操作。由于 OpenID 2.0 允许非请求（unsolicited）的断言，攻击者可控制的 OpenID 提供者能够将攻击者身份绑定到已登录受害者（点击了恶意构造链接）的账户上。随后，攻击者可通过 OpenID 登录冒充该受害者，而该登录流程不会执行本地 TOTP 或 WebAuthn 验证。修复后，该回调现要求携带与用户绑定的、有时效限制的 值。

AI Predicted 8.8 Difficulty: Easy

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gitea Gitea ≤ 28.1.0 affected
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I. Basic Information for CVE-2026-104627

Vulnerability Information
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Vulnerability Title
Gitea OpenID account linking without session binding
Source: CVE Program / CVE List V5
Vulnerability Description
The Gitea OpenID association callback in the security settings accepted a positive OpenID 2.0 assertion without checking that the signed-in user had started the linking. Because OpenID 2.0 allows unsolicited assertions, an attacker-controlled OpenID provider could attach the attacker's identity to the account of a signed-in victim who opened a crafted link, and the attacker could then sign in as the victim through OpenID login, which does not apply the local TOTP or WebAuthn checks. The callback now requires a time-limited `state` value bound to the user.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gitea Gitea 0 ~ 28.1.0 -

II. Public POCs for CVE-2026-104627

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III. Intelligence Information for CVE-2026-104627

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Patches & Fixes for CVE-2026-104627 (2)

Other References for CVE-2026-104627 (1)

Same Patch Batch · Gitea · 2026-10-18 · 12 CVEs total

CVE-2026-109553 Gitea SSH certificate principal impersonation of other users
CVE-2026-105661 Gitea panic on the repositories route of individual users
CVE-2026-105964 Gitea Actions artifact v4 API unbounded request body
CVE-2026-109844 Gitea watched repositories API disclosure after access revocation
CVE-2026-107618 Gitea cross-site request forgery on repository topics
CVE-2026-107686 Gitea reactions accepted on locked issues and comments
CVE-2026-110494 Gitea release attachment re-linking of issue attachments
CVE-2026-110324 Gitea private profile information disclosure through POST request
CVE-2026-110311 Gitea draft release creation disclosing attachment metadata
CVE-2026-97204 Gitea label deletion across repository and organization IDs
CVE-2026-97859 Gitea API disclosure of private user social graph, keys and stars

IV. Related Vulnerabilities

Same product: Gitea
Same vendor: Gitea
Same weakness: CWE-287

V. Comments for CVE-2026-104627

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