Description
webp-converter before 3.0.0 contains an OS command injection vulnerability in src/webpconverter.js helpers that run libwebp binaries via execFile with shell enabled. Attackers controlling file names or option strings passed to cwebp, dwebp, gwebp, or webpmux functions can inject shell metacharacters to execute OS commands as the Node.js process.
References7
- github.com/scionoftech/webp-converter
- github.com/scionoftech/webp-converter/blob/3729b65f1e904ab56b94…
- github.com/scionoftech/webp-converter/blob/e09d963d772cae9ff6af…
- github.com/scionoftech/webp-converter/commit/f1b6724bc2e89f67ab…
- github.com/scionoftech/webp-converter/pull/53
- github.com/scionoftech/webp-converter/pull/53#issuecomment-5091…
- www.vulncheck.com/advisories/webp-converter-before-3.0.0-os-com…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
9.3
CRITICAL
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 3% percentile: 85 · as of 11 November 2026
- CWE
- CWE-78
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.