CVE-2026-73278— Gitea WebAuthn bypass during OAuth and OIDC sign-in
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 的 OAuth2 和 OpenID Connect 登录路径在 WebAuthn 是账户唯一配置的第二因素时，不需要进行 WebAuthn 挑战。攻击者若能通过受影响的外部身份验证流程进行认证，则可以在无需强制验证通行密钥的情况下获得完整会话（这与密码登录时所强制验证的机制不同）。其中一个受影响的登录路径还可持久化外部身份关联，从而将入侵范围从初始会话扩展至后续操作；对于已配置 TOTP 的账户，则不属于本次报告的仅启用 WebAuthn 的场景。
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I. Basic Information for CVE-2026-73278
Vulnerability Information
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Vulnerability Title
Gitea WebAuthn bypass during OAuth and OIDC sign-in
Source: CVE Program / CVE List V5
Vulnerability Description
Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario.
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
II. Public POCs for CVE-2026-73278
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Other References for CVE-2026-73278 (5)
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https://github.com/go-gitea/gitea/releases/tag/v1.27.2 release-notes
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https://blog.gitea.com/release-of-1.27.2/ release-notes
Same Patch Batch · Gitea · 2026-10-06 · 21 CVEs total
| CVE-2026-104636 | Gitea SSRF through Git HTTP redirects in mirrors and fetches | |
| 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-2026-104632 | Gitea fork workflow approval bypass through cancel and rerun | |
| CVE-2026-94205 | Gitea fork workflow approval bypass through maintainer-triggered events | |
| CVE-2026-101027 | Gitea migration SSRF through ALLOWED_DOMAINS address check bypass | |
| 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
-
CVE-2026-96589
Gitea private repository access retained after rejected tran -
CVE-2026-96580
Gitea Actions memory exhaustion through large static matrice -
CVE-2026-96404
Gitea installer authentication bypass for existing accounts -
CVE-2026-96400
Gitea migration SSRF to reserved addresses through ALLOWED_D -
CVE-2026-96399
Gitea denial of service through external issue tracker patte
Same vendor: Gitea
-
CVE-2026-96589
Gitea private repository access retained after rejected tran -
CVE-2026-96580
Gitea Actions memory exhaustion through large static matrice -
CVE-2026-96404
Gitea installer authentication bypass for existing accounts -
CVE-2026-96400
Gitea migration SSRF to reserved addresses through ALLOWED_D -
CVE-2026-96399
Gitea denial of service through external issue tracker patte
Same weakness: CWE-287
-
CVE-2026-106460
Backstage: Explicit negative email verification can be ignor -
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CVE-2026-59358
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CVE-2026-105704
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V. Comments for CVE-2026-73278
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