CVE-2026-56422
Critical MISP REST API flaw allows authenticated users to modify or inject data across objects.
Is CVE-2026-56422 being exploited?
Not confirmed. CVE-2026-56422 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.60% probability of exploitation in the next 30 days.
How severe is CVE-2026-56422?
CVE-2026-56422 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-56422?
Yes. A fix has been recorded for CVE-2026-56422. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-56422 affect?
CVE-2026-56422 affects MISP (Malware Information Sharing Platform). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-56422?
Patch ASAP; upgrade to patched release with ID re-pin hardening.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can overwrite or re-parent objects, transfer ownership, or inject data into another user's context via crafted REST/form payloads.
Patch when possible
- affected<= 2.5.41
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.