CVE-2026-31934: CWE-407: Inefficient Algorithmic Complexity in OISF suricata
CVE-2026-31934 is a vulnerability in OISF Suricata versions 8. 0. 0 through 8. 0. 3 where a quadratic algorithmic complexity issue occurs when searching for URLs in MIME encoded SMTP messages. This leads to a significant performance degradation. The issue has been addressed and patched in version 8. 0. 4.
AI Analysis
Technical Summary
Suricata, a network IDS/IPS and NSM engine, suffered from an inefficient algorithmic complexity vulnerability (CWE-407) in versions 8.0.0 to before 8.0.4. Specifically, the URL search function within MIME encoded SMTP messages exhibited quadratic time complexity, causing performance impacts under certain conditions. This vulnerability does not affect confidentiality or integrity but impacts availability due to degraded performance. The issue was fixed in Suricata version 8.0.4.
Potential Impact
The vulnerability causes a high severity performance impact (availability) on affected Suricata versions when processing MIME encoded SMTP messages containing URLs. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Suricata to version 8.0.4 or later, where this quadratic complexity issue has been patched. Patch status is confirmed by the vendor advisory indicating the fix is included in version 8.0.4.
CVE-2026-31934: CWE-407: Inefficient Algorithmic Complexity in OISF suricata
Description
CVE-2026-31934 is a vulnerability in OISF Suricata versions 8. 0. 0 through 8. 0. 3 where a quadratic algorithmic complexity issue occurs when searching for URLs in MIME encoded SMTP messages. This leads to a significant performance degradation. The issue has been addressed and patched in version 8. 0. 4.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata, a network IDS/IPS and NSM engine, suffered from an inefficient algorithmic complexity vulnerability (CWE-407) in versions 8.0.0 to before 8.0.4. Specifically, the URL search function within MIME encoded SMTP messages exhibited quadratic time complexity, causing performance impacts under certain conditions. This vulnerability does not affect confidentiality or integrity but impacts availability due to degraded performance. The issue was fixed in Suricata version 8.0.4.
Potential Impact
The vulnerability causes a high severity performance impact (availability) on affected Suricata versions when processing MIME encoded SMTP messages containing URLs. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Suricata to version 8.0.4 or later, where this quadratic complexity issue has been patched. Patch status is confirmed by the vendor advisory indicating the fix is included in version 8.0.4.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-10T15:10:10.654Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69ce82f2e6bfc5ba1de1d943
Added to database: 4/2/2026, 2:53:38 PM
Last enriched: 4/10/2026, 12:08:09 AM
Last updated: 5/20/2026, 8:50:57 PM
Views: 44
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.