Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M

CVE-2026-41414Skim: Arbitrary code execution via pull_request_target fork checkout in pr.yml

High 7.4

In plain English

A high-severity code injection in skim from skim-rs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.3%top 79.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	skim	no fix listed	DEBIAN-CVE-2026-41414

Affected products (as reported)

Vendor	Product	Versions
skim-rs	skim	< bf63404ad51985b00ed304690ba9d477860a5a75

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

References

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