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CVE-2026-31935— Suricata http2: unbounded resource consumption

Quick assessment

Affected
OISF suricata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata 7.0.15之前版本和8.0.4之前版本存在安全漏洞，该漏洞源于特制HTTP2延续帧的泛洪可能导致内存耗尽，通常导致操作系统关闭Suricata进程。

CVSS 7.5 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-31935

Vulnerability Information
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Vulnerability Title
Suricata http2: unbounded resource consumption
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, flooding of craft HTTP2 continuation frames can lead to memory exhaustion, usually resulting in the Suricata process being shut down by the operating system. This issue has been patched in versions 7.0.15 and 8.0.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Suricata 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata 7.0.15之前版本和8.0.4之前版本存在安全漏洞，该漏洞源于特制HTTP2延续帧的泛洪可能导致内存耗尽，通常导致操作系统关闭Suricata进程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OISF suricata < 7.0.15 -

II. Public POCs for CVE-2026-31935

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III. Intelligence Information for CVE-2026-31935

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Vendor Advisories for CVE-2026-31935 (1)

Same Patch Batch · OISF · 2026-04-02 · 6 CVEs total

CVE-2026-31933 7.5 HIGH Suricata stream: quadratic complexity in stream inspection
CVE-2026-31932 7.5 HIGH Suricata krb5: quadratic complexity in krb5 buffering
CVE-2026-31931 7.5 HIGH Suricata tls: null dereference in tls.alpn rule keyword
CVE-2026-31934 7.5 HIGH Suricata smtp/mine: quadratic complexity in extracting urls
CVE-2026-31937 7.5 HIGH Suricata dcerpc: quadratic complexity in dcerpc buffering

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-400

V. Comments for CVE-2026-31935

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