CVE-2026-31934— Suricata smtp/mine: quadratic complexity in extracting urls
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I. Basic Information for CVE-2026-31934
Vulnerability Information
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Vulnerability Title
Suricata smtp/mine: quadratic complexity in extracting urls
Source: NVD (National Vulnerability Database)
Vulnerability Description
Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, there is a quadratic complexity issue when searching for URLs in mime encoded messages over SMTP leading to a performance impact. This issue has been patched in version 8.0.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
算法复杂性
Source: NVD (National Vulnerability Database)
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 8.0.0至8.0.4之前版本存在安全漏洞，该漏洞源于在SMTP的MIME编码消息中搜索URL时存在二次复杂度问题，可能导致性能影响。
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
II. Public POCs for CVE-2026-31934
| # | POC Description | Source Link | Shenlong Link |
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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-2026-31935 | 7.5 HIGH | Suricata http2: unbounded resource consumption |
| CVE-2026-31937 | 7.5 HIGH | Suricata dcerpc: quadratic complexity in dcerpc buffering |
IV. Related Vulnerabilities
Same product: suricata
- CVE-2026-31937
Suricata dcerpc: quadratic complexity in dcerpc buffering - CVE-2026-31935
Suricata http2: unbounded resource consumption - CVE-2026-31933
Suricata stream: quadratic complexity in stream inspection - CVE-2026-31932
Suricata krb5: quadratic complexity in krb5 buffering - CVE-2026-31931
Suricata tls: null dereference in tls.alpn rule keyword
Same vendor: OISF
- CVE-2026-31937
Suricata dcerpc: quadratic complexity in dcerpc buffering - CVE-2026-31935
Suricata http2: unbounded resource consumption - CVE-2026-31933
Suricata stream: quadratic complexity in stream inspection - CVE-2026-31932
Suricata krb5: quadratic complexity in krb5 buffering - CVE-2026-31931
Suricata tls: null dereference in tls.alpn rule keyword
Same weakness: CWE-407
- CVE-2026-45186
libexpat<2.8.1 XML输入拒绝服务漏洞 - CVE-2026-42245
net-imap: Quadratic complexity when reading response literal - CVE-2026-43967
Quadratic fragment-name uniqueness check causes denial of se - CVE-2026-40476
graphql-php: Denial of Service via quadratic complexity in O - CVE-2026-35599
Vikunja has an Algorithmic Complexity DoS in Repeating Task
V. Comments for CVE-2026-31934
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