fetchmail security update
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)
OESA-2026-4207
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:OESA-2026-4207
fetchmail
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 6.4.22-4.oe2203sp4
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.4.22-4.oe2203sp4"
}
]
}
],
"package": {
"name": "fetchmail",
"purl": "pkg:rpm/openEuler/fetchmail&distro=openEuler-22.03-LTS-SP4",
"ecosystem": "openEuler:22.03-LTS-SP4"
},
"database_specific": {
"source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4207.json"
},
"ecosystem_specific": {
"src": [
"fetchmail-6.4.22-4.oe2203sp4.src.rpm"
],
"x86_64": [
"fetchmail-6.4.22-4.oe2203sp4.x86_64.rpm",
"fetchmail-debuginfo-6.4.22-4.oe2203sp4.x86_64.rpm",
"fetchmail-debugsource-6.4.22-4.oe2203sp4.x86_64.rpm"
],
"aarch64": [
"fetchmail-6.4.22-4.oe2203sp4.aarch64.rpm",
"fetchmail-debuginfo-6.4.22-4.oe2203sp4.aarch64.rpm",
"fetchmail-debugsource-6.4.22-4.oe2203sp4.aarch64.rpm"
]
}
}
]Publisher severity
high
Source reference: /database_specific/severity
- Event
- #52128 · Revision 1
- Added to Heist Feed
- Publisher date