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Back to active CVEs
Medium · CVSS 5.8CVE-2026-114479

Not Failing Securely ('Failing Open') in hMailServerCVE-2026-114479

Answer in brief

CVE-2026-114479 records a Medium severity (CVSS 5.8) vulnerability in Not Failing Securely ('Failing Open') in hMailServer. The current sources do not mark it as known exploited. The current feed maps Progressive Robot Ltd/hMailServer (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Progressive Robot Ltd/hMailServer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Progressive Robot Ltd/hMailServergeneric>=6.0.0 <=6.3.6Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Progressive Robot Ltd/hMailServer.
  2. 2Review the reported fix. Source-reported solution: Upgrade to hMailServer 6.3.7, in which the action replaces a message whose one part is an attachment, an S/MIME message signed as one part among them, with its note, as it replaces a message with no text part, and deletes a message it cannot read, or whose stripped form it cannot write over the message's file, as the delete action does, sending its recipients the message-deleted notice. A message that is one text part, and an encrypted message, are still delivered as they arrived. Until then, set the anti-virus action to delete the whole message, the default, wherever an infected message must not be delivered.

Evidence timeline and material changes

  1. Published upstream

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • Source referencegitlab.com
  • Source referencegitlab.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Incorrect Authorization in hMailServerSame progressive robot ltd/hmailserver package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-636
Source
CVE List V5
Source checked
Oct 21, 2026
References
2 linked sources
Open source record