CVE-2026-9137

The CSP report endpoint 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
CIRCLCNA
5.1 MEDIUM
NETWORK
LOW
NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
misp-projectmisp
2.5.0 ≤
𝑥
≤ 2.5.37
CNA
Common Weakness Enumeration
References
https://github.com/MISP/MISP/commit/02932cccab230b295afcaf5aa05e363d30db0ec9