CVE-2026-71418 Suricata - Denial of Service

Suricata 8.0.0 to 8.0.6 contains a denial of service caused by improper clearing of internal buffer in DNS-over-HTTP/2 processing in rust/src/http2/http2.rs, letting attackers cause CPU overload and packet loss, exploit requires sending multiple HTTP/2 DATA frames with EndOfStream flag.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-407

Vendor fix

Upgrade to version 8.0.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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