Stack-based Buffer Overflow Affecting wolfssl package, versions [0,]
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.
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Test your applications- Snyk IDSNYK-CONAN-WOLFSSL-15762299
- published24 Mar 2026
- disclosed19 Mar 2026
- creditMaor Caplan
Introduced: 19 Mar 2026
NewCVE-2026-0819 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow in the wc_PKCS7_BuildSignedAttributes function. An attacker can cause stack or heap memory corruption by providing untrusted input that controls the size of the signedAttribs array, leading to writing beyond the bounds of a fixed-size buffer during PKCS7 SignedData encoding. This is only exploitable if an application allows untrusted input to control the signedAttribs array size when calling PKCS7 signing functions.
Workaround
This vulnerability can be mitigated by validating and limiting the number of custom signed attributes to no more than the allowed maximum, and ensuring untrusted input cannot control the signedAttribs array or its size.