CVE-2026-31932 Suricata krb5: quadratic complexity in krb5 buffering

High 7.5 Published 2 Apr 2026 Updated 2 Apr 2026

Attackers can cause performance degradation in Suricata via inefficient KRB5 buffering, leading to denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-31932?

CVE-2026-31932 is a high-severity denial of service vulnerability in Oisf Suricata, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, inefficiency in KRB5 buffering can lead to performance degradation. This issue has been patched in versions 7.0.15 and 8.0.4.

Weakness: CWE-407

Which versions are affected by CVE-2026-31932?

It affects 1 product.

Products include Oisf Suricata.

How do I fix CVE-2026-31932?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-31932 being exploited?

There is no known exploitation of CVE-2026-31932 in the wild and no public exploit code.

All Oisf Suricata vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-31932, GHSA-rp9m-jcpw-hggr, UBUNTU-CVE-2026-31932.