What’s Vulnerable › Vulnerabilities
CVE-2026-9137: CSP Report Endpoint Log Flooding in MISP via Incorrect Size Limit
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-20 · updated 2026-07-23
- Weakness: CWE-400
Description
The CSP report endpoint in MISP intended to limit logged CSP reports to 1 KB but incorrectly allowed reports up to 1 MB before truncation. On deployments where the endpoint is reachable by untrusted clients, this could allow attackers to generate excessive log volume and contribute to resource exhaustion or log flooding.
Affected products
- MISP: from 2.5.0 before 2.5.38 — fixed in 2.5.38
How to fix
Upgrade to a fixed version: MISP 2.5.38. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-9137 or the next vulnerability affects your stack