CVE-2026-41414

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

CVSS 7.4 HIGHEPSS 0.3%CWE-94

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS 7.4EPSS 0.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

24 Apr 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

skim-rs · skim

public PoCs found — 1

cve_referencedrive.google.com/file/d/1Gj7ziTK42YWXYoQgTbis_rMitHR59J6F/viewunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://drive.google.com/file/d/1Gj7ziTK42YWXYoQgTbis_rMitHR59J6F/view https://github.com/skim-rs/skim/commit/bf63404ad51985b00ed304690ba9d477860a5a75 https://github.com/skim-rs/skim/security/advisories/GHSA-9g93-rxr5-xhqw