PatchTheCVECVE-2026-10855: An authorization flaw existed in the MISP Event Template Importer overwrite workflow
CVE-2026-10855 is a medium-severity flaw (CVSS 4.3) affecting misp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An authorization flaw existed in the MISP Event Template Importer overwrite workflow. When importing an event template in overwrite mode, the application checked whether a matching template already existed but did not verify that the importing user belonged to the organization that owned the existing template. As a result, an authenticated user with access to the template import functionality could forcibly overwrite an event template owned by an
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 96%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-06-04 |
| Last modified | 2026-07-22 |
Last updated 2026-07-22 · 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-2026-10855?
misp: upgrade to 2.5.39. Exact commands for each OS are on this page.
Is CVE-2026-10855 being exploited?
CVE-2026-10855 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-2026-10855 affect?
CVE-2026-10855 affects misp. Severity is medium (CVSS 4.3). An authorization flaw existed in the MISP Event Template Importer overwrite workflow. When importing an event template in overwrite mode, the application checked whether a matching template already existed but did not verify that the import
How urgent is CVE-2026-10855?
Priority 16/100. No elevated risk signals yet.
Related CVEs
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