CVE-2026-85538 MISP Attribute Deletion Authorization Bypass Allows Users Without Modify Permissions to Delete Attributes

An incorrect authorization vulnerability in MISP allowed authenticated users to delete attributes from events despite lacking the required permmodify or permmodifyorg permissions. The affected attribute deletion paths relied on organization membership checks performed by...

CVE-2026-85533

CVE-2026-85533 is an authorization bypass in MISP (Malware Information Sharing Platform). In attribute attachment/editing and Galaxy Cluster creation/editing workflows, the Sharing Group authorization check was only executed when the distribution field was explicitly set to 4. By omitting or mani...

CVE-2026-85533 MISP Sharing Group Authorization Bypass via Omitted Distribution Parameter

An authorization flaw in MISP allowed an authenticated user to submit a sharinggroupid without verifying that the user was authorized to use the referenced Sharing Group. In several attribute and Galaxy Cluster creation and editing workflows, validation of the submitted Sharing Group was performe...

EUVD-2026-70976

An authorization flaw in MISP allowed an authenticated user to submit a sharinggroupid without verifying that the user was authorized to use the referenced Sharing Group. In several attribute and Galaxy Cluster creation and editing workflows, validation of the submitted Sharing Group was performe...

CVE-2026-85238

MISP contains a session fixation vulnerability in the CustomAuth authentication a custom configuration flow. When a user was successfully authenticated through CustomAuth, MISP stored the authenticated user identity in the existing session without first rotating the session identifier. As a resul...

CVE-2026-85239

A vulnerability in MISP's event template handling allowed an authenticated user with permission to create or modify event templates to bypass validation of the template definition field. The EventTemplate::beforeValidate method only performed semantic validation when the supplied definition was...

CVE-2026-85237

A vulnerability in MISP's email-based one-time password OTP authentication flow allowed an attacker to perform an unrestricted number of OTP verification attempts. The emailotp endpoint did not apply brute-force protection when validating submitted OTP values. An attacker who had reached the OTP...

CVE-2026-85236

A cross-site request forgery CSRF vulnerability existed in the cullEmptyEvents action of MISP. The endpoint performed a state-changing and irreversible operation while accepting HTTP GET requests. Because bodyless GET requests are not subject to CakePHP's CSRF validation, an attacker could cause ...

EUVD-2026-70533

A vulnerability in MISP's event template handling allowed an authenticated user with permission to create or modify event templates to bypass validation of the template definition field. The EventTemplate::beforeValidate method only performed semantic validation when the supplied definition was...

CVE-2026-85239 MISP Event Template Definition Validation Bypass Allows Persistent Denial of Service

A vulnerability in MISP's event template handling allowed an authenticated user with permission to create or modify event templates to bypass validation of the template definition field. The EventTemplate::beforeValidate method only performed semantic validation when the supplied definition was...

CVE-2026-85239

MISP is vulnerable to a validation bypass in its event template handling. The EventTemplate::beforeValidate() method only applied semantic validation when the definition was already an array; a caller supplying a pre-encoded string (including malformed JSON ) bypassed validateDefinition() and onl...

CVE-2026-85238

MISP contains a session fixation vulnerability in its CustomAuth authentication flow (a custom configuration). The root cause is that __customAuthentication() wrote the authenticated user into the existing CakePHP session without first calling Session->renew(), which had been disabled. An atta...

EUVD-2026-70532

MISP contains a session fixation vulnerability in the CustomAuth authentication a custom configuration flow. When a user was successfully authenticated through CustomAuth, MISP stored the authenticated user identity in the existing session without first rotating the session identifier. As a resul...

CVE-2026-85238 Session Fixation in MISP CustomAuth Authentication Allows Session Hijacking

MISP contains a session fixation vulnerability in the CustomAuth authentication a custom configuration flow. When a user was successfully authenticated through CustomAuth, MISP stored the authenticated user identity in the existing session without first rotating the session identifier. As a resul...

CVE-2026-85237

MISP 's email_otp() endpoint lacked brute-force protection when validating OTP values, allowing an attacker who had passed the primary credential check to submit unlimited OTP guesses while the same OTP remained valid. The risk was compounded because OTPs are bound to the user rather than a singl...

EUVD-2026-70528

A vulnerability in MISP's email-based one-time password OTP authentication flow allowed an attacker to perform an unrestricted number of OTP verification attempts. The emailotp endpoint did not apply brute-force protection when validating submitted OTP values. An attacker who had reached the OTP...

CVE-2026-85237 Missing Rate Limiting in Email OTP Verification Allows Brute-Force Authentication Bypass

A vulnerability in MISP's email-based one-time password OTP authentication flow allowed an attacker to perform an unrestricted number of OTP verification attempts. The emailotp endpoint did not apply brute-force protection when validating submitted OTP values. An attacker who had reached the OTP...

CVE-2026-85221

MISP contains an improper TLS certificate validation vulnerability in CurlClient. The CurlClient::$verifyPeer property was not explicitly initialized and therefore defaulted to null. When passed to cURL, this value effectively disabled TLS peer verification unless the calling code explicitly...

CVE-2026-85226

MISP contains an authorization flaw in the OnDemand correlation engine where correlations were calculated solely from matching attribute values without applying the distribution, sharing group, organization, or other access-control restrictions associated with the correlated attributes and events...

CVE-2026-85227

MISP contains a reflected Cross-Site Scripting XSS vulnerability in the event attribute filtering query builder. The taggedAttributes and galaxyAttachedAttributes URL parameters were inserted into the query-builder rules without HTML escaping before being serialized as JSON and embedded inside a...