CVE-2026-22263: medium-severity vulnerability in OISF suricata
Suricata http1: quadratic complexity in headers parsing over multiple packets
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.4%
In short
Suricata's HTTP header parsing becomes very slow when processing requests split across multiple network packets, potentially causing the security system to lag or become unresponsive.
Technical detail
CWE-1050 inefficiency in HTTP/1 headers parsing exhibits quadratic complexity when headers span multiple packets, allowing an attacker to send fragmented HTTP requests that consume excessive CPU resources and degrade IDS/IPS performance without requiring authentication or special privileges.
Summary generated and translated by AI from the official description.
Suricata is a network IDS, IPS and NSM engine. Starting in version 8.0.0 and prior to version 8.0.3, inefficiency in http1 headers parsing can lead to slowdown over multiple packets. Version 8.0.3 patches the issue. No known workarounds are available.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
OISF · suricataRelated CVEs — OISF suricata
In the same product, most dangerous first.
CVE-2026-45769HIGHikev2: unbounded client transform storage can lead to resource exhaustionEPSS 1.8%CVE-2024-38535HIGHSuricata http2: oom from duplicate headersEPSS 1.2%CVE-2024-23836HIGHcrafted traffic can cause denial of serviceEPSS 1.2%CVE-2024-55627MEDIUMSuricata segfault on StreamingBufferSlideToOffsetWithRegionsEPSS 1.0%CVE-2024-32663HIGHSuricata 's http2 parser contains an improper compressed header handling can lead to resource starvationEPSS 1.0%CVE-2024-23835HIGHSuricata's pgsql: memory exhaustion use on record parsingEPSS 0.9%