PatchTheCVECVE-2026-56423: MISP Core contained broken access-control checks in the bulk deletion flows for Event Reports and Sharing Grou
CVE-2026-56423 is a high-severity flaw (CVSS 8.8) affecting misp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
MISP Core contained broken access-control checks in the bulk deletion flows for Event Reports and Sharing Groups. The affected deleteSelection handlers authorized deletion using broad role-level permissions instead of validating authorization for each selected object. For Event Reports, EventReportsController::deleteSelection relied on the global perm_add capability rather than a per-report ownership/authorization check. As a result, a contribut
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 60%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-06-22 |
| Last modified | 2026-06-23 |
Last updated 2026-06-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-56423?
misp: upgrade to 2.5.42. Exact commands for each OS are on this page.
Is CVE-2026-56423 being exploited?
CVE-2026-56423 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-56423 affect?
CVE-2026-56423 affects misp. Severity is high (CVSS 8.8). MISP Core contained broken access-control checks in the bulk deletion flows for Event Reports and Sharing Groups. The affected deleteSelection handlers authorized deletion using broad role-level permissions instead of validating authorizati
How urgent is CVE-2026-56423?
Priority 41/100. High severity
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