PT-2026-51293 · Misp · Misp

Andras Iklody + 2 · Published 2026-06-22 · Updated 2026-06-22 · CVE-2026-56422

NVD

CVSS v4.0

9.4

Critical

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:X/V:X/RE:X/U:X

Multiple MISP core controllers and model capture paths accepted client-controlled request fields such as primary keys (id) and ownership/scope foreign keys (event id, org id, user id, sharing group id, galaxy cluster uuid, organisation uuid, and related nested object identifiers) without consistently stripping, pinning, or revalidating them against the server-authorized object.

In affected paths, an authenticated user with access to one authorized object could submit crafted REST or form payloads that caused MISP to save data against a different object than the one checked by the authorization logic. Depending on the endpoint, this could allow object overwrite, object re-parenting, ownership transfer, unauthorized sharing-group scoping, event/object injection, proposal retargeting, or stored attacker-controlled content appearing in another user’s context.

The fixes harden affected create/edit/import flows by stripping client-supplied primary keys on create-only saves, re-pinning route- or database-authorized identifiers before save operations, validating effective sharing-group scope, and adding field whitelists where ownership fields must never be editable. The initial broad fix also added a central CRUDComponent::edit() primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub’s patch for 7acf8220c describes this central issue as CRUDComponent::edit() copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP save() to update an arbitrary row unless the loaded ID is re-pinned.

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-56422

Affected Products

Misp

References · 17

• https://github.com/MISP/MISP/commit/63aebc27a878233b9475c742985aaef909bc755b · Patch
• https://github.com/MISP/MISP/commit/00b2e3dae56fa24ea750eb525cc4709b7e5bee85 · Patch
• https://github.com/MISP/MISP/commit/bc182d55dde5686a36ca2eb88fe6c2adabb9fad9 · Patch
• https://github.com/MISP/MISP/commit/025f711506850aadb69cde1b57e5e5d57628c87f · Patch
• https://github.com/MISP/MISP/commit/8311427c2edd72a8341f0a65e1f11073d7ad9191 · Patch
• https://github.com/MISP/MISP/commit/3ff6bd9cfdab5d41b4667ea7298d88ffd6f3fcb8 · Patch
• https://github.com/MISP/MISP/commit/634f1f87c295193486c08c2c7ba1fee8a7339baa · Patch
• https://github.com/MISP/MISP/commit/7acf8220cafac58bcfb362da37aca512fe4bb396 · Patch
• https://github.com/MISP/MISP/commit/84bafe69f5d0ab7f811371c0801a613f271ebc0b · Patch
• https://github.com/MISP/MISP/commit/05aad418c57bb78e6b58a843d70d45de8f50db45 · Patch
• https://github.com/MISP/MISP/commit/c80a3533b3d787f45f5185a4621cc0f05b0cf2e5 · Patch
• https://github.com/MISP/MISP/commit/58f637aaab4d133e72f1454ebb963191d96d3b78 · Patch
• https://github.com/MISP/MISP/commit/ab9619dfa6cb5210fd20fb3b0b57006e4fc93916 · Patch
• https://github.com/MISP/MISP/commit/57433015815e59db5a1f11536f90920952cf3fcd · Patch
• https://github.com/MISP/MISP/commit/2cc26f38f3e85c594957899f09043d5193146607 · Patch