Is CVE-2026-22263 in the CISA KEV catalog?

No. CVE-2026-22263 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-22263?

CVE-2026-22263 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-22263?

CVE-2026-22263 has an EPSS score of 0.40% (32th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-22263?

Upgrade suricata on debian unstable to 1:8.0.3-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-22263

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-1050

How to fix

Remediation Available

suricataDebian

Fixed in:1:8.0.3-1CVE-2026-22263

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

0.40%probability of exploitation in 30 days

32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Other references1

redmine.openinfosecfoundation.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-29.