Security readout for executives and security teams
Plain-English summary
CVE-2026-22263 can make Suricata 8.0.0 through 8.0.2 slow down when processing certain HTTP/1 headers split across multiple packets. The impact is availability only: reduced IDS/IPS/NSM performance. The vendor says 8.0.3 fixes it and no workarounds are known.
Executive priority
Treat as a timely maintenance update, not an emergency. Prioritize environments where Suricata is inline, capacity constrained, or critical to detection coverage because slowdown can reduce security visibility or enforcement.
Technical view
Suricata’s HTTP/1 header parsing has quadratic complexity across multiple packets in versions 8.0.0 before 8.0.3. The CVSS 3.1 score is 5.3, network exploitable, low complexity, no privileges or user interaction, with low availability impact and no confidentiality or integrity impact.
Likely exposure
Organizations running Suricata 8.0.0, 8.0.1, or 8.0.2 on network traffic paths are potentially exposed. Exposure is most relevant where Suricata inspects HTTP/1 traffic and performance degradation could reduce monitoring or enforcement effectiveness.
Exploitation context
The source bundle does not report active exploitation, and this CVE is not listed as KEV. The issue could be triggered remotely over the network, but available public information describes slowdown rather than code execution or data compromise.
Researcher notes
Public sources identify the vulnerable version range, fixed version, CVSS vector, and related patch/issue links. They do not provide evidence of exploitation in the wild or a workaround. Avoid assuming impact beyond availability degradation.
Mitigation direction
- Upgrade Suricata to version 8.0.3 or later.
- Prioritize sensors inspecting high-volume or untrusted HTTP traffic.
- If unable to upgrade, check OISF guidance for any updated mitigations.
- Monitor Suricata performance until remediation is complete.
Validation and detection
- Inventory Suricata versions across all sensors and appliances.
- Confirm whether any deployment runs versions 8.0.0 through 8.0.2.
- Verify successful upgrade to Suricata 8.0.3 or later.
- Review monitoring for abnormal Suricata slowdown or packet processing delays.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-1050: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-22263 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/OISF/suricata/security/advisories/GHSA-rwc5-hxj6-hwx7CVE reference · x_refsource_CONFIRM
- https://github.com/OISF/suricata/commit/018a377f74e3eb2b042c6f783ad9043060923428CVE reference · x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8201CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Excessive Platform Resource Consumption within a Loop
Excessive Platform Resource Consumption within a Loop represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.