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CVE-2026-118394— Gitea OAuth2 userinfo private group disclosure to public-only tokens

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.

OAuth2 的用户信息端点（）在决定是否将声明限制为仅公开组织时，错误地重新解析了请求头中的 OAuth2 访问令牌，而非使用实际用于认证该请求的凭证的作用域（scope）。当通过查询参数或表单字段发送“仅限公开”的 OAuth2 令牌，或使用“仅限公开”的个人访问令牌时，该作用域会被解析为空，导致声明中列出了令牌持有者的私有组织、团队以及被隐藏的成员身份。此次信息泄露仅限于组织名称、团队名称和成员关系，不会暴露任何仓库内容。目前，该端点已修复，改为使用认证令牌的作用域进行判断。

AI Predicted 5.3 Difficulty: Easy Updated Nov 01, 2026

Possible ATT&CK Techniques 3 AI

T1087 · Account Discovery T1592 · Gather Victim Host Information T1040 · Network Sniffing

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Gitea	Gitea	`1.23.0< 28.3.0`	affected

Updated Nov 01, 2026

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Vulnerability Information

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Vulnerability Title

Gitea OAuth2 userinfo private group disclosure to public-only tokens

Source: CVE Program / CVE List V5

Vulnerability Description

The OAuth2 userinfo endpoint (`/login/oauth/userinfo`) decided whether to limit the `groups` claim to public organizations by re-parsing the `Authorization` header as an OAuth2 access token instead of using the scope of the credential that authenticated the request. When a public-only OAuth2 token was sent as a query parameter or form field, or a public-only personal access token was used, that scope came back empty and the claim listed the token owner's private organizations, teams and concealed memberships. The disclosure is limited to the owner's organization and team names and memberships; no repository content is exposed. The endpoint now uses the scope of the authenticating token.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

信息暴露

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Gitea	Gitea	1.23.0 ~ 28.3.0	-

II. Public POCs for CVE-2026-118394

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118394

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Other References for CVE-2026-118394 (5)

https://github.com/go-gitea/gitea/releases/tag/v28.3.0 release-notes
https://blog.gitea.com/release-of-28.3.0/ release-notes
https://github.com/go-gitea/gitea/pull/39690 patch
https://github.com/go-gitea/gitea/security/advisories/GHSA-q9gm-9c7q-c5hq vendor-advisory
https://github.com/go-gitea/gitea/pull/39853 patch

https://www.cve.org/CVERecord?id=CVE-2026-118394

Same Patch Batch · Gitea · 2026-11-01 · 20 CVEs total

CVE-2026-117646		Gitea private repository listing to public-only tokens on profiles
CVE-2026-118386		Gitea Actions fork workflow trust through pull request review commit
CVE-2026-120263		Gitea OAuth2 account auto-linking takeover through the sign-up form
CVE-2026-112887		Gitea Actions task token private repository enumeration
CVE-2026-113429		Gitea stored XSS through legacy Actions artifact Content-Encoding
CVE-2026-114199		Gitea contribution heatmap private activity disclosure to public-only tokens
CVE-2026-116289		Gitea public-only token bypass through Actions runner registration
CVE-2026-116296		Gitea archived repository release, milestone and label modification
CVE-2026-116474		Gitea Actions job token spoofing of instance-signed commits
CVE-2026-117635		Gitea admin API public-only token scope bypass
CVE-2026-119627		Gitea limited-visibility profile disclosure with public-only tokens
CVE-2026-117649		Gitea private issue disclosure through issue dependency timeline events
CVE-2026-117677		Gitea Helm chart upload decompression denial of service
CVE-2026-117685		Gitea public-only package token access to private OCI blobs
CVE-2026-118395		Gitea public-only token bypass in repository and organization creation
CVE-2026-118504		Gitea issue changes on archived repositories through the API
CVE-2026-119441		Gitea public-only token bypass on bulk organization repository deletion
CVE-2026-119533		Gitea private pull request disclosure on project boards
CVE-2026-119625		Gitea user and organization feed token scope bypass

IV. Related Vulnerabilities

Same product: Gitea

Same vendor: Gitea

Same weakness: CWE-200