CVE-2026-71418

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Source
https://cve.org/CVERecord?id=CVE-2026-71418
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-71418.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-71418
Aliases
  • GHSA-xjgq-3qw4-jp5f
Downstream
Published
2026-09-18T20:24:28Z
Modified
2026-09-20T03:47:31Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Suricata doh2: crafted HTTP/2 DATA frames can cause quadratic CPU consumption
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-407"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71418.json"
}
References

Affected packages

Git / github.com/oisf/suricata

Affected ranges

Type
GIT
Repo
https://github.com/oisf/suricata
Events
Introduced
9956286fb89f9cad9e9f95b99dc751f8666617b7
Fixed
1731805967edf5d31448db2ae43cf72c6cf46c11
Fixed
26c26dea84f00de95151a0e16d21c1fcafac9648
Fixed
4c28cc1b4ac64f48efdca6ce3e09748227a04a7e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "8.0.0"
        },
        {
            "fixed":  "8.0.6"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

suricata-8.*
suricata-8.0.0
suricata-8.0.1
suricata-8.0.2
suricata-8.0.3
suricata-8.0.4
suricata-8.0.5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-71418.json"