Is CVE-2026-45764 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-45764 being exploited in the wild.

How severe is CVE-2026-45764?

Critical severity, with a CVSS score of 9.1, published 10 September 2026.

Which products and versions are affected?

OISF Suricata 7.0.x before 7.0.16, 8.0.x before 8.0.5.

Is there a fix for CVE-2026-45764?

A patch was published on 2026-05-19: Suricata 7.0.16 and 8.0.5 released with fixes Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-45764 attacked?

It is attacked over the network.

Am I affected by CVE-2026-45764?

Check whether you run OISF Suricata at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-45764: Suricata HTTP/2 type confusion denial of service

CVE-2026-45764 · Severity: critical · CVSS 9.1 · Published 2026-09-10

Suricata is a network security monitoring and intrusion detection/prevention system used to protect enterprise networks by analyzing traffic patterns. A flaw in HTTP/2 protocol handling could allow an attacker to craft malicious network traffic that causes Suricata to crash, disabling security monitoring and leaving the network unprotected during the outage.

Technologies: OISF Suricata. Vendors: OISF.

Quick answers

Is CVE-2026-45764 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-45764 being exploited in the wild.
How severe is CVE-2026-45764?: Critical severity, with a CVSS score of 9.1, published 10 September 2026.
Which products and versions are affected?: OISF Suricata 7.0.x before 7.0.16, 8.0.x before 8.0.5.
Is there a fix for CVE-2026-45764?: A patch was published on 2026-05-19: Suricata 7.0.16 and 8.0.5 released with fixes Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-45764 attacked?: It is attacked over the network.
Am I affected by CVE-2026-45764?: Check whether you run OISF Suricata at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a type confusion flaw (CWE-843) in Suricata's HTTP/2 protocol parsing logic. When processing specially crafted HTTP/2 traffic, a protocol state change causes the application to access a resource using an incompatible type, leading to memory corruption and a crash. The vulnerability requires network-level access to send crafted packets and affects Suricata 7.0.x before 7.0.16 and 8.0.x before 8.0.5. No privilege escalation or user interaction is required. An attacker can trigger a denial of service by remotely sending malicious HTTP/2 frames. The fix is available in Suricata 7.0.16 and 8.0.5; as a temporary workaround, HTTP/2 parsing can be disabled.

Affected products

OISF Suricata 7.0.x before 7.0.16, 8.0.x before 8.0.5

Timeline

2026-05-19: disclosed
2026-05-19: patched: Suricata 7.0.16 and 8.0.5 released with fixes

References

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