CVE-2026-71418Suricata doh2: crafted HTTP/2 DATA frames can cause quadratic CPU consumption
Updated under an hour ago ()
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It affects OISF suricata. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OISF suricata oisf:suricata (from the name) | from 8.0.0, < 8.0.6 | CNA record |
oisf suricata oisf:suricata | from 8.0.0 before 8.0.6 | NVD |
References
- https://github.com/OISF/suricata/security/advisories/GHSA-xjgq-3qw4-jp5fx-refsource-confirm, mitigation, vendor-advisory
- https://github.com/OISF/suricata/commit/1731805967edf5d31448db2ae43cf72c6cf46c11x-refsource-misc, patch
- https://github.com/OISF/suricata/commit/26c26dea84f00de95151a0e16d21c1fcafac9648x-refsource-misc, patch
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6x-refsource-misc, release-notes
- https://redmine.openinfosecfoundation.org/issues/8725x-refsource-misc, issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.