CVE-2026-103858
MISP contains an incomplete authorization check in the discussion posting functionality. When a user submits a post to a thread or replies t
CVSS
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Sin CVSS
EPSS
0.2%
p12
KEV
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Exploit Today
4
0-100
Publicado: 1 oct 2026 · Última mod.: 1 oct 2026 · CWE-285
MISP contains an incomplete authorization check in the discussion posting functionality. When a user submits a post to a thread or replies to an existing post, the application only verified whether the target thread was restricted to a single organization (org-only distribution). It did not enforce the full thread access control list, including sharing-group membership and event-level visibility. As a result, an authenticated user who is outside the relevant sharing group or who does not have visibility on the associated event could: - Read the thread title and the content of the quoted post - Submit a new post into the discussion thread This constitutes both an information disclosure (reading restricted thread and post content) and an integrity issue (injecting content into a thread the user is not authorized to participate in). Affected: <2.5.48