Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
CometVisu Backend for openHAB (org.openhab.ui.bundles:org.openhab.ui.cometvisu) versions before 4.2.1 are affected. Its file system endpoints lack authentication, and the file-update endpoint is vulnerable to path traversal, so a remote attacker can overwrite existing files on the openHAB instance. If an overwritten shell script is later executed, this can lead to remote code execution. Upgrade to version 4.2.1.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 9.8 | Critical | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.012, the 68th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:13 UTC First seen by agentprime
- 31 Oct 2026, 15:13 UTC Confirmed by OSV