CVE-2026-104658Reliance on Untrusted Inputs in a Security Decision in hMailServer
Updated under an hour ago ()
Does this affect you?
It affects Progressive Robot Ltd hMailServer. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.11%, higher than 1% of scored CVEs.
Do this next
Free account, 1 product
The Linux live-update apply helper (hmailserver-update) of Progressive Robot hMailServer 6.3.4 and 6.3.5 runs as root on a request file written by the unprivileged hmailserver service account, and took from that request the program used to verify an AppImage update's signature and the systemd unit to stop before reading the service account's files. An attacker who already runs code as the hmailserver service account, for example through another flaw in the mail server, can therefore have arbitrary code executed as root, on any Linux installation where the live update's path unit is active - the default for the project's .deb and .rpm packages - and on AppImage installations run under that unit.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-807
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.11% (percentile 1)
- Assigned by
- GitLab
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Progressive Robot Ltd hMailServer progressive_robot:hmailserver (from the name) | from 6.3.4 before 6.3.6 | CNA record |
References
- https://gitlab.com/hmailserver/hmailserver/-/work_items/58
- https://gitlab.com/hmailserver/hmailserver/-/releases/v6.3.6
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.