Stack-based Buffer Overflow Affecting mtrojnar/osslsigncode package, versions [,2.12)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-MTROJNAROSSLSIGNCODE-16081965
- published16 Apr 2026
- disclosed9 Apr 2026
- creditopera-aklajn
Introduced: 9 Apr 2026
CVE-2026-39853 (opens in a new tab)How to fix?
Upgrade mtrojnar/osslsigncode to version 2.12 or higher.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow in the signature verification process. An attacker can execute arbitrary code or cause a crash by providing a crafted signed file containing an oversized digest field, which triggers an unbounded copy into a fixed-size stack buffer during verification.