Network Intrusion Detection System Vulnerability in Suricata by Open Information Security Foundation
CVE-2026-31931

7.5HIGH

Key Information:

Vendor

Oisf

Status
Suricata
Vendor
CVE Published:
2 April 2026

What is CVE-2026-31931?

An issue has been identified in Suricata, a prominent network intrusion detection and prevention system, where the use of the 'tls.alpn' rule keyword causes the application to crash due to a NULL dereference. The affected versions range from 8.0.0 to prior to 8.0.4. Users are advised to update to version 8.0.4 to mitigate this issue.

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Affected Version(s)

suricata >= 8.0.0, < 8.0.4

References

https://github.com/OISF/suricata/security/advisories/GHSA...
x_refsource_CONFIRM
https://redmine.openinfosecfoundation.org/issues/8294
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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