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CVE-2026-96399— Gitea denial of service through external issue tracker patterns

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.

漏洞描述翻译如下： 一个仓库的外部问题追踪器（external issue tracker）的正则表达式中，如果包含交替捕获组（alternating capture groups），在Gitea渲染问题引用时可能会导致无效的切片索引，从而引发运行时恐慌（panic），终止Gitea进程。任何有权编辑仓库外部问题追踪器设置的用户，都可以使得后续对匹配内容的渲染（例如查看README文件）崩溃该实例，影响所有用户。

AI Predicted 5.3 Difficulty: Easy

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gitea Gitea ≤ 1.27.3 affected
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I. Basic Information for CVE-2026-96399

Vulnerability Information
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Vulnerability Title
Gitea denial of service through external issue tracker patterns
Source: CVE Program / CVE List V5
Vulnerability Description
A repository's external issue tracker regular expression containing alternating capture groups could produce invalid slice indexes when Gitea rendered issue references, causing a runtime panic that terminated the Gitea process. A user who can edit a repository's external issue tracker settings could make any later rendering of matching content, such as viewing a README, crash the instance for all users.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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-2026-96399

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III. Intelligence Information for CVE-2026-96399

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Other References for CVE-2026-96399 (4)

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

CVE-2026-104636 Gitea SSRF through Git HTTP redirects in mirrors and fetches
CVE-2026-73278 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-2026-96404 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
Same vendor: Gitea
Same weakness: CWE-125

V. Comments for CVE-2026-96399

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