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Tool Directory

CVE-2026-41414

HighPublished

Skim: Arbitrary code execution via pull_request_target fork checkout in pr.yml

Published: Apr 24, 2026
Updated: Apr 27, 2026
Assigning CNA: GitHub_M
Evidence observed: Sep 7, 2026

Primary CVSS

7.4/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 20.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Skim is a fuzzy finder designed to through files, lines, and commands. The generate-files job in .github/workflows/pr.yml checks out attacker-controlled fork code and executes it via cargo run, with access to SKIM_RS_BOT_PRIVATE_KEY and GITHUB_TOKEN (contents:write). No gates prevent exploitation - any GitHub user can trigger this by opening a pull request from a fork. This vulnerability is fixed with commit bf63404ad51985b00ed304690ba9d477860a5a75.

Sources

gha-lab-456dd8a245Research
Security-research lab reproducing CVE-2026-41414 (pull_request_target pwn in .github/workflows/pr.yml) — snapshot of skim-rs/skim @ ca986f4, not a fork.

Responsible use

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