Heap-based Buffer Overflow Affecting biosig package, versions [,3.9.3)
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-PYTHON-BIOSIG-15374224
- published4 Mar 2026
- disclosed3 Mar 2026
- creditMark Bereza, Lilith
Introduced: 3 Mar 2026
CVE-2026-20777 (opens in a new tab)How to fix?
Upgrade Biosig to version 3.9.3 or higher.
Overview
Biosig is a BioSig - tools for biomedical signal processing
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the Nicolet WFT parsing functionality. An attacker can execute arbitrary code by supplying a specially crafted .wft file.
PoC
A heap-based buffer overflow vulnerability exists in the Nicolet WFT parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9a9a63). A specially crafted .wft file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.