CVE-2026-114474
Use of Less Trusted Source in hMailServer
02 Description
Use of Less Trusted Source in hMailServer
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.16% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 5.3% of scored records. A rank, not a probability.
- NVD base score
- 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-22.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-21 15:12Z7 DAYS AGO
- Last updated
- 2026-10-21 15:12Z7 DAYS AGO
- Reserved
- 2026-10-21
- Assigning CNA
- GitLab
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.9)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-348Use of Less Trusted SourceBase
- Data version
- 5.2
- Document digest
- 13eba284a5893c7ff7f54952ca946fe9d3e52ca8e9ea6b037bb09d38c7dde89f
05 Affected products
06 References
07 Remediation
Upgrade to hMailServer 6.3.7, in which a download does not take an address hosted on the server from its From as its envelope sender - it keeps the empty envelope sender, as a download whose From names no address does - and a forward or redirect of it is held to the rule 6.3.7 applies to every copy of mail from outside: it is sent on with an envelope sender, or under a host name, in the organisation of a domain its From names only when the message passed DMARC for that organisation when it arrived, which a download never has. Until then, do not forward or redirect to an outside address the mail of an account that collects an external mailbox where that mail's From can name a domain the server hosts; the spam checks of an external account are off unless they are set, and a download has no DMARC verdict of its own to hold it.