CVE-2026-45764
published 2026-09-10CVE-2026-45764: 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…
PriorityP353critical9.1CVSS 3.1
AVNACLPRNUINSUCNIHAH
EPSS
0.63%
49.7th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| oisf | suricata | < 7.0.16 | 7.0.16 |
| oisf | suricata | — | — |
| oisf | suricata | >= 7.0.0 < 7.0.16 | 7.0.16 |
| oisf | suricata | >= 8.0.0 < 8.0.5 | 8.0.5 |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
vendor_redhat9.1CRITICAL
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Red Hat
suricata: Suricata http2: protocol-change type confusion can lead to denial of service
vendor_redhat·2026-09-10·CVSS 9.1
CVE-2026-45764 [CRITICAL] CWE-843 suricata: Suricata http2: protocol-change type confusion can lead to denial of service
suricata: Suricata http2: protocol-change type confusion can lead to denial of service
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.
A type confusion flaw was found in Suricata's HTTP/2 protocol parsing engine. When processing network traffic, Suricata fails to properly validate protocol state transitions during HTTP/2 frame handling. A remote, unauthenticated attacker could exploit this vulnerability by transmitt
VulDB
OISF Suricata up to 7.0.15/8.0.4 HTTP/2 Processing type confusion
vuldb·2026-09-10·CVSS 9.1
CVE-2026-45764 [CRITICAL] OISF Suricata up to 7.0.15/8.0.4 HTTP/2 Processing type confusion
A vulnerability categorized as critical has been discovered in OISF Suricata up to 7.0.15/8.0.4. Impacted is an unknown function of the component HTTP2 Processing. Such manipulation leads to type confusion.
This vulnerability is uniquely identified as CVE-2026-45764. The attack can be launched remotely. No exploit exists.
It is advisable to upgrade the affected component.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service [epel-all]
bugzilla·2026-09-15·CVSS 9.1
CVE-2026-45764 [CRITICAL] CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service [epel-all]
CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service [fedora-all]
bugzilla·2026-09-15·CVSS 9.1
CVE-2026-45764 [CRITICAL] CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service [fedora-all]
CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service
bugzilla·2026-09-10·CVSS 9.1
CVE-2026-45764 [CRITICAL] CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service
CVE-2026-45764 suricata: Suricata http2: protocol-change type confusion can lead to denial of service
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.
2026-09-10
Published