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Libbiosig CVE-2026-22891

CRITICAL
Heap-based Buffer Overflow (CWE-122)
2026-03-03 talos-cna@cisco.com
Buffer Overflow Heap Overflow Libbiosig
9.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
PoC Detected
Mar 05, 2026 - 18:15 vuln.today
Public exploit code
CVE Published
Mar 03, 2026 - 15:16 nvd
CRITICAL 9.8

DescriptionNVD

A heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9a9a63). A specially crafted Intan CLP file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

AnalysisAI

Heap overflow in libbiosig 3.9.2 Intan CLP parsing. PoC available.

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RemediationAI

Within 24 hours: Identify all systems and applications using libbiosig 3.9.2 or Master Branch; disable CLP file parsing if not essential to operations. Within 7 days: Implement network segmentation to isolate affected systems; restrict file upload and processing capabilities to trusted internal sources only; monitor for suspicious activity. …

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CVE-2026-22891 vulnerability details – vuln.today
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