What is the CVSS score of CVE-2026-22891?

CVE-2026-22891 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Libbiosig are affected by CVE-2026-22891?

A critical vulnerability in libbiosig 3.9.2 allows arbitrary code execution through malicious Intan CLP files, with public exploits already available.

Is there a public PoC exploit available for CVE-2026-22891?

Yes, a public proof-of-concept exploit is available for CVE-2026-22891. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-22891?

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. Within 30 days: Transition to alternative biomedical signal libraries or await vendor patch; establish vendor communication protocol for security updates.

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 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

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

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

DescriptionCVE.org

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.