OESA-2026-4206

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4206
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-4206.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-4206
Upstream
Published
2026-09-30T13:47:36Z
Modified
2026-10-01T02:00:06Z
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
fetchmail security update
Details

Fetchmail is a mail retrieval daemon that can download messages from POP3, IMAP, ODMR and ETRN-based stores, with SSL/TLS security including certificate verification, and pass downloaded mail to a local SMTP or LMTP server, or a message delivery agent such as maildrop.

Security Fix(es):

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.(CVE-2026-94184)

Database specific 
{
    "severity":  "High"
}
References

Affected packages

openEuler:24.03-LTS-SP4 / fetchmail

Package

Name
fetchmail
Purl
pkg:rpm/openEuler/fetchmail&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.4.37-3.oe2403sp4

Ecosystem specific 

{
    "aarch64":  [
        "fetchmail-6.4.37-3.oe2403sp4.aarch64.rpm",
        "fetchmail-debuginfo-6.4.37-3.oe2403sp4.aarch64.rpm",
        "fetchmail-debugsource-6.4.37-3.oe2403sp4.aarch64.rpm"
    ],
    "src":  [
        "fetchmail-6.4.37-3.oe2403sp4.src.rpm"
    ],
    "x86_64":  [
        "fetchmail-6.4.37-3.oe2403sp4.x86_64.rpm",
        "fetchmail-debuginfo-6.4.37-3.oe2403sp4.x86_64.rpm",
        "fetchmail-debugsource-6.4.37-3.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4206.json"