Out-of-bounds Write 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-15762319
- published24 Mar 2026
- disclosed19 Mar 2026
- creditHaruto Kimura
Introduced: 19 Mar 2026
NewCVE-2026-3849 (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 Out-of-bounds Write in the wc_HpkeLabeledExtract function when processing an oversized ECH configuration. An attacker can cause a client crash or achieve remote code execution by sending a maliciously crafted ECH config from a TLS server supporting ECH. This is only exploitable if ECH is enabled via the enable-ech configuration option.