DEBIAN-CVE-2026-94184

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Source
https://security-tracker.debian.org/tracker/CVE-2026-94184
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-94184
Upstream
Published
2026-09-21T15:17:38Z
Modified
2026-09-24T09:00:17Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening. Affects v5.0.8 through v6.6.6.

References

Affected packages

Debian:12 / fetchmail

Package

Name
fetchmail
Purl
pkg:deb/debian/fetchmail?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.4.37-1
6.4.38-1
6.4.39-1
6.5.6-1
6.5.6-2
6.5.7-1
6.6.0-1
6.6.1-1
6.6.2-1
6.6.2-2
6.6.2-3
6.6.3-1
6.6.3-2
6.6.3-3
6.6.6-1
6.6.8-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json"

Debian:13 / fetchmail

Package

Name
fetchmail
Purl
pkg:deb/debian/fetchmail?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.4.39-1
6.5.6-1
6.5.6-2
6.5.7-1
6.6.0-1
6.6.1-1
6.6.2-1
6.6.2-2
6.6.2-3
6.6.3-1
6.6.3-2
6.6.3-3
6.6.6-1
6.6.8-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json"

Debian:14 / fetchmail

Package

Name
fetchmail
Purl
pkg:deb/debian/fetchmail?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.4.39-1
6.5.6-1
6.5.6-2
6.5.7-1
6.6.0-1
6.6.1-1
6.6.2-1
6.6.2-2
6.6.2-3
6.6.3-1
6.6.3-2
6.6.3-3
6.6.6-1
6.6.8-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json"