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Vulnerability record · CVE-2026-45764 · published 10 September 2026

CVE-2026-45764: Oisf suricata type confusion vulnerability

Oisf · Suricata

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.

9.1 CVSS 3.1 Critical EPSS 0.63% · top 51.8% CWE-843 · Type confusion
9.1CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
16 Sep 2026Last modified by NVD

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 Release NotesVendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-5rvq-72r5-rqhr Third Party Advisory
https://redmine.openinfosecfoundation.org/issues/8492 Permissions Required

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-22262Oisf suricata stack-based buffer overflow vulnerabilitySuricata is a network IDS, IPS and NSM engine. While saving a dataset a stack buffer is used to prepare the data. Prior to versions 8.0.3 and 7.0.14,…EPSS 0.55%9.8CVE-2023-35853Oisf suricata code injection vulnerabilityIn Suricata before 6.0.13, an adversary who controls an external source of Lua rules may be able to execute Lua code. This is addressed in 6.0.13 by …EPSS 1.0%9.8CVE-2021-37592Oisf suricata out-of-bounds write vulnerabilitySuricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a certain sequence of segments.EPSS 1.6%9.8CVE-2018-10244Oisf suricata integer overflow vulnerabilitySuricata version 4.0.4 incorrectly handles the parsing of an EtherNet/IP PDU. A malformed PDU can cause the parsing code to read beyond the allocated…EPSS 1.7%9.1CVE-2026-22264Oisf suricata use after free vulnerabilitySuricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free cond…EPSS 0.40%9.1CVE-2019-18792Oisf suricata interpretation conflict vulnerabilityAn issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet…EPSS 2.5%8.1CVE-2024-23839Oisf suricata use after free vulnerabilitySuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.3, specially craft…EPSS 0.78%7.5CVE-2026-45770Oisf suricata out-of-bounds write vulnerabilitySuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and p…EPSS 0.48%

Source: NIST National Vulnerability Database (record CVE-2026-45764), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.