OISF Suricata up to 8.0.2 http1 Header Parser excessive platform resource consumption within a loop

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in OISF Suricata up to 8.0.2. Impacted is an unknown function of the component http1 Header Parser. Executing a manipulation can lead to excessive platform resource consumption within a loop. The identification of this vulnerability is CVE-2026-22263. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in OISF Suricata up to 8.0.2 and classified as problematic. This vulnerability affects an unknown function of the component http1 Header Parser. The manipulation with an unknown input leads to a excessive platform resource consumption within a loop vulnerability. The CWE definition for the vulnerability is CWE-1050. The product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-22263 since 01/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 297415 (Linux Distros Unpatched Vulnerability : CVE-2026-22263), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.0.3 eliminates this vulnerability. Applying the patch 018a377f74e3eb2b042c6f783ad9043060923428 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (297415). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Excessive platform resource consumption within a loop
CWE: CWE-1050 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 297415
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-22263

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Suricata 8.0.3
Patch: 018a377f74e3eb2b042c6f783ad9043060923428

Timelineinfo

01/07/2026 CVE reserved
01/27/2026 +20 days Advisory disclosed
01/27/2026 +0 days VulDB entry created
01/31/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 8201
Status: Confirmed

CVE: CVE-2026-22263 (🔒)
GCVE (CVE): GCVE-0-2026-22263
GCVE (VulDB): GCVE-100-343084

Entryinfo

Created: 01/27/2026 20:49
Updated: 01/31/2026 21:07
Changes: 01/27/2026 20:49 (66), 01/31/2026 21:07 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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