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.

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History

Fri, 29 May 2026 07:45:00 +0000

Type Values Removed Values Added
Description 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. 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.
Title CSP Report Endpoint Log Flooding via Incorrect Size Limit CSP Report Endpoint Log Flooding in MISP via Incorrect Size Limit

Wed, 20 May 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Misp
Misp misp
Vendors & Products Misp
Misp misp

Wed, 20 May 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 20 May 2026 19:30:00 +0000

Type Values Removed Values Added
Description 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.
Title CSP Report Endpoint Log Flooding via Incorrect Size Limit
Weaknesses CWE-400
References
Metrics cvssV4_0

{'score': 5.1, 'vector': '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: CIRCL

Published:

Updated: 2026-05-29T06:57:50.739Z

Reserved: 2026-05-20T18:42:18.665Z

Link: CVE-2026-9137

cve-icon Vulnrichment

Updated: 2026-05-20T19:26:42.606Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-05-20T20:16:46.177

Modified: 2026-05-29T08:16:19.403

Link: CVE-2026-9137

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-29T08:30:26Z

Weaknesses