CVE-2026-45764: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in 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.
AI Analysis
Technical Summary
Suricata versions before 7.0.16 and 8.0.5 contain a type confusion vulnerability (CWE-843) caused by a protocol change while processing HTTP/2 traffic. This vulnerability can be exploited by crafted traffic to crash Suricata, leading to denial of service. The vulnerability has a CVSS 3.1 score of 9.1, indicating critical severity with high impact on integrity and availability. Fixed versions 7.0.16 and 8.0.5 resolve the issue. Disabling HTTP/2 parsing is a suggested workaround if upgrading is not immediately possible.
Potential Impact
Exploitation of this vulnerability can cause Suricata to crash, resulting in denial of service. There is no indication of confidentiality impact, but integrity and availability are affected. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Suricata to version 7.0.16 or 8.0.5 or later to apply the official fix. If upgrading is not feasible immediately, disable HTTP/2 parsing as a temporary workaround to prevent exploitation.
CVE-2026-45764: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in OISF suricata
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 v3.1
Score 9.1critical
Affected software
OISF
suricata
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata versions before 7.0.16 and 8.0.5 contain a type confusion vulnerability (CWE-843) caused by a protocol change while processing HTTP/2 traffic. This vulnerability can be exploited by crafted traffic to crash Suricata, leading to denial of service. The vulnerability has a CVSS 3.1 score of 9.1, indicating critical severity with high impact on integrity and availability. Fixed versions 7.0.16 and 8.0.5 resolve the issue. Disabling HTTP/2 parsing is a suggested workaround if upgrading is not immediately possible.
Potential Impact
Exploitation of this vulnerability can cause Suricata to crash, resulting in denial of service. There is no indication of confidentiality impact, but integrity and availability are affected. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Suricata to version 7.0.16 or 8.0.5 or later to apply the official fix. If upgrading is not feasible immediately, disable HTTP/2 parsing as a temporary workaround to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-13T07:45:21.250Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa321e791cc7f3848c5a092
Added to database: 09/10/2026, 21:32:23 UTC
Last enriched: 09/10/2026, 21:46:50 UTC
Last updated: 09/10/2026, 22:12:31 UTC
Views: 3
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