CVE-2026-54357: MISP improper authorization allows organization administrators to modify site administrator user settings

Versions reported by the vendor

Affected version ranges reported by the assigning authority (CIRCL). Independent of NVD's CPE analysis and usually ahead of it.

• misp misp

  • before 2.5.40affected · semver

Other highest-scoring records for the same primary product.

• CVE-2026-103655MISP TOTP Code Replay Allows Duplicate Authentication Within Validity Period
  37Monitor
• CVE-2026-90961MISP LdapAuth and LinOTPAuth Authentication Bypass via Empty or Non-String Credentials
  37Monitor
• CVE-2026-56422MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields
  37Monitor

Published before and after this one in the same product

• ← EarlierCVE-2026-9084May 20, 2026 · MISP OIDC authentication bypass via automatic email-based account linking under insecure IdP configurations
  24Monitor
• ← EarlierCVE-2026-10868Jun 4, 2026 · MISP user edit endpoint mass assignment vulnerability allows unauthorized user account modification
  36Monitor
• Later →CVE-2026-54358Jun 12, 2026 · MISP organization administrators can target site administrator accounts for password reset
  30Monitor

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const invoice = await Invoice.findById(req.params.id);2res.json(invoice);

1const invoice = await Invoice.findOne({2  id: req.params.id,3  ownerId: req.user.id,4});5if (!invoice) return res.sendStatus(404);6res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.