Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-103670— Gitea trusted workflow cancellation by unapproved fork runs

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 Gitea Actions 任务（run）被插入时，同一工作流级别并发组中的旧任务会被取消，但系统未检查新任务是否仍需人工批准。由于分叉（fork）的拉取请求任务是基于基础仓库插入的，因此，能够通过分叉发起拉取请求的用户，可以在未获得批准且未执行任何代码的情况下，取消与已启用 策略的并发组共享的、可信的正在进行的任务。在使用自托管运行器（self-hosted runners）的环境中，这可能导致部署中断，并遗留部分中间状态。

AI Predicted 5.9 Difficulty: Easy

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gitea Gitea ≤ 1.27.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-103670

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Gitea trusted workflow cancellation by unapproved fork runs
Source: CVE Program / CVE List V5
Vulnerability Description
When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled without checking whether the new run still needed approval. Because fork pull request runs are inserted under the base repository, a user who can open a pull request from a fork could cancel trusted in-progress runs that share a concurrency group with `cancel-in-progress` enabled, without approval and without running any code. On self-hosted runners this can interrupt deployments and leave partial state behind.
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-2026-103670

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-103670

请登录查看更多情报信息。

Other References for CVE-2026-103670 (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-2026-101027 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

IV. Related Vulnerabilities

Same product: Gitea
Same vendor: Gitea

V. Comments for CVE-2026-103670

No comments yet

Leave a comment