CVE-2026-114479 Not Failing Securely ('Failing Open') in hMailServer
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-114479?
CVE-2026-114479 is a medium-severity vulnerability in Progressive Robot Ltd hMailServer, published on 21 Oct 2026.
Official description
Not failing securely in the anti-virus attachment-stripping action of Progressive Robot hMailServer 6.0.0 through 6.3.6 allows a remote unauthenticated attacker to have a message that the server's virus scanner found infected delivered to the recipient's mailbox unchanged. With virus scanning enabled and its action set to remove attachments and deliver the text (the default action deletes the message), the server keeps one text part of an infected message and replaces every attachment with a note. A message whose single part is not text - a program or an archive sent as the whole message, a message carried whole, a file declared an attachment, or an S/MIME message signed as one part, whose content the recipient's mail client opens - had no part the action could pick out, and was delivered as it arrived, with the content the scanner had found and nothing but a line in the application log to show it. Any sender can write such a message.
Weakness: CWE-636
Which versions are affected by CVE-2026-114479?
How do I fix CVE-2026-114479?
No fix has been published for CVE-2026-114479 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-114479 being exploited?
There is no known exploitation of CVE-2026-114479 in the wild and no public exploit code.
Sources
Also known as GHSA-c5hp-vrp8-f5pg.