Vulnerability Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, DNS-over-HTTP/2 processing in rust/src/http2/http2.rs retains previously processed HTTP/2 DATA frame contents instead of clearing the internal buffer. Multiple DATA frames with the EndOfStream flag set can grow the buffer to its 65 KiB limit while causing all prior contents to be processed again, producing quadratic CPU complexity, degraded packet processing, loss of monitoring visibility, or denial of service. This issue is fixed in version 8.0.6.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/OISF/suricata/commit/1731805967edf5d31448db2ae43cf72c6cf46c11
- https://github.com/OISF/suricata/commit/26c26dea84f00de95151a0e16d21c1fcafac9648
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
- https://github.com/OISF/suricata/security/advisories/GHSA-xjgq-3qw4-jp5f
- https://redmine.openinfosecfoundation.org/issues/8725
FAQ
What is CVE-2026-71418?
CVE-2026-71418 is a vulnerability with a CVSS score of 7.5 (HIGH). Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, DNS-over-HTTP/2 processing in rust/src/http2/http2.rs reta...
How severe is CVE-2026-71418?
CVE-2026-71418 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-71418?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.