OESA-2026-4209 (CVE-2026-94184)
Vulnerability from osv_openeuler – Published: 2026-09-30 13:47 – Updated: 2026-09-30 13:47 – Source websiteFetchmail 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)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"fetchmail-6.4.37-3.oe2403sp3.aarch64.rpm",
"fetchmail-debuginfo-6.4.37-3.oe2403sp3.aarch64.rpm",
"fetchmail-debugsource-6.4.37-3.oe2403sp3.aarch64.rpm"
],
"src": [
"fetchmail-6.4.37-3.oe2403sp3.src.rpm"
],
"x86_64": [
"fetchmail-6.4.37-3.oe2403sp3.x86_64.rpm",
"fetchmail-debuginfo-6.4.37-3.oe2403sp3.x86_64.rpm",
"fetchmail-debugsource-6.4.37-3.oe2403sp3.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP3",
"name": "fetchmail",
"purl": "pkg:rpm/openEuler/fetchmail\u0026distro=openEuler-24.03-LTS-SP3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.4.37-3.oe2403sp3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "High"
},
"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.\r\n\r\nSecurity Fix(es):\n\nA 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.\n\nAffects v5.0.8 through v6.6.6.(CVE-2026-94184)",
"id": "OESA-2026-4209",
"modified": "2026-09-30T13:47:38Z",
"published": "2026-09-30T13:47:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4209"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94184"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "fetchmail security update",
"upstream": [
"CVE-2026-94184"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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