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CVE-2026-42603— OWASP BLT: pre-commit-fix.yaml executes untrusted fork code via pull_request_target

Quick assessment

Affected
OWASP-BLT BLT
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.

OWASP BLT是OWASP BLT开源的一个游戏化众包测试与漏洞披露平台。 OWASP BLT 2.1.2之前版本存在代码注入漏洞，该漏洞源于pre-commit-fix.yaml工作流使用pull_request_target触发器但直接检出并执行攻击者分支的代码，可能导致远程代码执行并具有写入权限。

CVSS 8.8 · High EPSS 0.46% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
OWASP-BLT BLT < 2.1.2 affected
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I. Basic Information for CVE-2026-42603

Vulnerability Information
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Vulnerability Title
OWASP BLT: pre-commit-fix.yaml executes untrusted fork code via pull_request_target
Source: CVE Program / CVE List V5
Vulnerability Description
OWASP BLT is a QA testing and vulnerability disclosure platform that encompasses websites, apps, git repositories, and more. Prior to 2.1.2, .github/workflows/pre-commit-fix.yaml uses pull_request_target (privileged trigger) but checks out and executes code directly from the attacker's fork, enabling RCE with write permissions. This vulnerability is fixed in 2.1.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
OWASP BLT 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OWASP BLT是OWASP BLT开源的一个游戏化众包测试与漏洞披露平台。 OWASP BLT 2.1.2之前版本存在代码注入漏洞，该漏洞源于pre-commit-fix.yaml工作流使用pull_request_target触发器但直接检出并执行攻击者分支的代码，可能导致远程代码执行并具有写入权限。
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
OWASP-BLT BLT < 2.1.2 -

II. Public POCs for CVE-2026-42603

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III. Intelligence Information for CVE-2026-42603

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Vendor Advisories for CVE-2026-42603 (1)

IV. Related Vulnerabilities

Same product: BLT
Same vendor: OWASP-BLT
Same weakness: CWE-94

V. Comments for CVE-2026-42603

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