CVE-2026-85236
CSRF in MISP cullEmptyEvents allowed deletion of published events via GET
Is CVE-2026-85236 being exploited?
Not confirmed. CVE-2026-85236 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 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-85236?
CVE-2026-85236 is rated High with a CVSS score of 8.8. 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-2026-85236?
Yes. A fix has been recorded for CVE-2026-85236. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-85236 affect?
CVE-2026-85236 affects MISP (cullEmptyEvents endpoint, pre-fix). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-85236?
Upgrade MISP to the commit that restricts cullEmptyEvents to POST or apply CSRF protections immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can be coerced to trigger deletion of published empty events via a GET, bypassing blocklist and causing potentially irreversible data loss.
Immediate action required
- affected<= 2.5.45
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.