PatchTheCVECVE-2026-10856: A URL validation flaw in the MISP dashboard button widget allowed a crafted relative-looking URL to be accepte
CVE-2026-10856 is a medium-severity flaw (CVSS 6.1) affecting misp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A URL validation flaw in the MISP dashboard button widget allowed a crafted relative-looking URL to be accepted as a local path while being interpreted by browsers as an external URL. The validation rejected URLs containing an explicit scheme, host, or user component, but did not reject paths beginning with a slash followed by a backslash, such as /\example.com. Some browsers normalize backslashes in URLs as forward slashes, which can turn this i
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.1% (top 96%) |
| CISA exploited list | No |
| Weakness | CWE-601 |
| 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-2026-10856?
misp: upgrade to 2.5.39. Exact commands for each OS are on this page.
Is CVE-2026-10856 being exploited?
CVE-2026-10856 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-2026-10856 affect?
CVE-2026-10856 affects misp. Severity is medium (CVSS 6.1). A URL validation flaw in the MISP dashboard button widget allowed a crafted relative-looking URL to be accepted as a local path while being interpreted by browsers as an external URL. The validation rejected URLs containing an explicit sche
How urgent is CVE-2026-10856?
Priority 22/100. No elevated risk signals yet.
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