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Vulnerability record · CVE-2026-9137 · published 20 May 2026

CVE-2026-9137: Misp-project misp uncontrolled resource consumption vulnerability

Misp Project · Misp

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.

5.1 CVSS 4.0 Medium EPSS 0.46% · top 62.3% CWE-400 · Uncontrolled resource consumption
5.1CVSS 4.0 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
23 Jul 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/MISP/MISP/commit/02932cccab230b295afcaf5aa05e363d30db0ec9 Patch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-29859Misp-project misp unrestricted file upload vulnerabilityIn MISP before 2.4.187, add_misp_export in app/Controller/EventsController.php does not properly check for a valid file upload.EPSS 0.82%9.8CVE-2024-29858Misp-project misp vulnerabilityIn MISP before 2.4.187, __uploadLogo in app/Controller/OrganisationsController.php does not properly check for a valid logo upload.EPSS 0.38%9.8CVE-2024-25674Misp-project misp unrestricted file upload vulnerabilityAn issue was discovered in MISP before 2.4.184. Organisation logo upload is insecure because of a lack of checks for the file extension and MIME type.EPSS 0.78%9.8CVE-2024-25675Misp-project misp vulnerabilityAn issue was discovered in MISP before 2.4.184. A client does not need to use POST to start an export generation process. This is related to app/Cont…EPSS 0.82%9.8CVE-2023-50918Misp-project misp vulnerabilityapp/Controller/AuditLogsController.php in MISP before 2.4.182 mishandles ACLs for audit logs.EPSS 0.79%9.8CVE-2023-48657Misp-project misp vulnerabilityAn issue was discovered in MISP before 2.4.176. app/Model/AppModel.php mishandles filters.EPSS 0.92%9.8CVE-2023-48655Misp-project misp vulnerabilityAn issue was discovered in MISP before 2.4.176. app/Controller/Component/IndexFilterComponent.php does not properly filter out query parameters.EPSS 0.92%9.8CVE-2023-48658Misp-project misp vulnerabilityAn issue was discovered in MISP before 2.4.176. app/Model/AppModel.php lacks a checkParam function for alphanumerics, underscore, dash, period, and s…EPSS 0.92%

Source: NIST National Vulnerability Database (record CVE-2026-9137), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.