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CVE-2026-58426— Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write

Quick assessment

Affected
Gitea Gitea Open Source Git Server
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gitea是Gitea组织开源的一个基于Go开发的轻量型git服务。 Gitea 1.22.0版本至1.26.1版本存在加密问题漏洞，该漏洞源于Actions Artifacts V4签名URL的HMAC模糊性，可能导致跨仓库读取工件以及跨任务写入上传状态。

CVSS 9.6 · Critical EPSS 0.30% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gitea Gitea Open Source Git Server 1.22.0≤ 1.26.1 affected
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I. Basic Information for CVE-2026-58426

Vulnerability Information
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Vulnerability Title
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Source: CVE Program / CVE List V5
Vulnerability Description
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Gitea 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gitea是Gitea组织开源的一个基于Go开发的轻量型git服务。 Gitea 1.22.0版本至1.26.1版本存在加密问题漏洞，该漏洞源于Actions Artifacts V4签名URL的HMAC模糊性，可能导致跨仓库读取工件以及跨任务写入上传状态。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gitea Gitea Open Source Git Server 1.22.0 ~ 1.26.1 -

II. Public POCs for CVE-2026-58426

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 8445 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-58426

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Patches & Fixes for CVE-2026-58426 (1)

Vendor Advisories for CVE-2026-58426 (1)

Security Blog Posts for CVE-2026-58426 (1)

Vendor Pages for CVE-2026-58426 (1)

Same Patch Batch · Gitea · 2026-07-03 · 40 CVEs total

CVE-2026-20896 9.8 CRITICAL Gitea Docker image trusts spoofable reverse-proxy headers by default
CVE-2026-22874 9.6 CRITICAL Gitea webhook and migration allow-list filtering permits SSRF
CVE-2026-58424 8.9 HIGH Permanent Fork PR Workflow Approval Gate Bypass
CVE-2026-28737 8.7 HIGH Gitea 3D file viewer allows stored XSS through glTF extensionsRequired
CVE-2026-26231 8.5 HIGH Gitea maintainer-edit permissions allow unauthorized commits to readable repositories
CVE-2026-28699 8.1 HIGH Gitea Basic Auth bypasses OAuth2 access token scopes
CVE-2026-22555 8.1 HIGH Gitea organization forks can expose organization secrets without create permission
CVE-2026-28744 8.1 HIGH Gitea Git smart HTTP bypasses repository token scopes for bearer tokens
CVE-2026-58423 7.7 HIGH LFS authentication bypass via malformed SSH sub-verb allows unauthorized read access to pr
CVE-2026-28740 7.1 HIGH Gitea LFS object reuse bypasses Code-unit authorization
CVE-2026-20779 7.1 HIGH Gitea TOTP single-use enforcement defect allows OTP replay
CVE-2026-58418 6.5 MEDIUM SSRF via HTTP Redirect in Repository Migration
CVE-2026-27761 4.3 MEDIUM Gitea repository feeds bypass API token scope enforcement
CVE-2026-25714 4.3 MEDIUM Gitea user organization API bypasses public-only token filtering
CVE-2026-27783 4.3 MEDIUM Gitea issue-template APIs bypass repository unit authorization
CVE-2026-28705 Gitea repository dumps write release assets using unsafe path names
CVE-2026-20706 Gitea repository archive downloads bypass token scope checks
CVE-2026-27660 Gitea draft releases use insufficient permission checks
CVE-2026-20909 Gitea tracked-time list endpoint has insufficient permission checks
CVE-2026-58421 Unauthenticated ReDoS via CODEOWNERS pattern matching allows denial of service

Showing top 20 of 40 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Gitea Open Source Git Server
Same vendor: Gitea
Same weakness: CWE-347

V. Comments for CVE-2026-58426

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