- 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.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
- Products
- suricata
CVSS 3.1
- Type
- Secondary
- Base score
- 7.5
- Impact score
- 3.6
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- HIGH
- security-advisories@github.com
- CWE-407
- Hype score
- Not currently trending
CVE-2026-71418: Suricata DoS, CVSS 7.5. DNS-over-HTTP/2 buffer flaw causes quadratic CPU use, degrading packet processing. Unpatched as of now - update immediately. https://t.co/bnTS8EUoaD #CVE #Suricata #infosec #Suricata #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet
@HugoValters
26 Sept 2026
36 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
CVE-2026-71418 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 processi… https://t.co/jdbHXWmICi
@CVEnew
19 Sept 2026
357 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*",
"matchCriteriaId": "BAC11753-611D-4E10-9F9B-1C21DD2371C4",
"versionEndExcluding": "8.0.6",
"versionStartIncluding": "8.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
]