Unauthorized sharing-group modification via state-changing GET requests
Published Sep 4, 2026 · Updated Sep 4, 2026
CSRF in MISP 2.4.54 and earlier allows remote attackers to modify sharing-group membership through state-changing GET requests. The __initialiseSGQuickEdit() helper leaves POST-only validation commented out for addOrg, removeOrg, addServer, and removeServer, so crafted GET requests execute those writes. An authenticated MISP user with sufficient sharing-group privileges must load the crafted URL; the resulting change can grant unintended data access or disrupt legitimate sharing.
Summary
What happened
CSRF in MISP 2.4.54 and earlier allows remote attackers to modify sharing-group membership through state-changing GET requests. The __initialiseSGQuickEdit() helper leaves POST-only validation commented out for addOrg, removeOrg, addServer, and removeServer, so crafted GET requests execute those writes. An authenticated MISP user with sufficient sharing-group privileges must load the crafted URL; the resulting change can grant unintended data access or disrupt legitimate sharing.
The record
- CVE
- CVE-2026-85546
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Vendor
- MISP Project
- Product
- MISP
- Classifications
- CWE-352, CAPEC-62
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 4, 2026CVE publishedPublication date reported by the CVE source.
- Sep 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=2.4.54
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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