DEBIAN-CVE-2026-16599
GNU wget is vulnerable to denial of service in its FTP OPIE/S-KEY authentication functionality. The server-supplied sequence number from the FTP challenge line is used as an iteration count for an MD5 key-derivation loop without any upper bound validation. A malicious FTP server or a network attacker positioned to intercept FTP traffic can send a crafted OPIE challenge with a sequence number near INT_MAX, causing wget to perform up to approximately 2.1 billion MD5 computations and suspend for some time. The --timeout option does not mitigate this because it applies only to network I/O, not CPU computation. This issue was fixed in commit e9697d98e7249b0f68a6be040a4f3dcc5bc101fa
DEBIAN-CVE-2026-16599
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:DEBIAN-CVE-2026-16599
wget
Source reference: /affected/0/package/name
- Affected versions
- 1.21.3-1
Source reference:
/affected/0/versions1.21.3-1+deb12u1Source reference:
/affected/0/versions1.21.4-1Source reference:
/affected/0/versions1.24.5-1Source reference:
/affected/0/versions1.24.5-2Source reference:
/affected/0/versions1.25.0-1Source reference:
/affected/0/versions1.25.0-2Source reference:
/affected/0/versions1.25.0-3Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
wget
Source reference: /affected/1/package/name
- Affected versions
- 1.25.0-2
Source reference:
/affected/1/versions1.25.0-3Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
wget
Source reference: /affected/2/package/name
- Affected versions
- 1.25.0-2
Source reference:
/affected/2/versions1.25.0-3Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- 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"
}
]
}
],
"package": {
"name": "wget",
"purl": "pkg:deb/debian/wget?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.21.3-1",
"1.21.3-1+deb12u1",
"1.21.4-1",
"1.24.5-1",
"1.24.5-2",
"1.25.0-1",
"1.25.0-2",
"1.25.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16599.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wget",
"purl": "pkg:deb/debian/wget?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.25.0-2",
"1.25.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16599.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wget",
"purl": "pkg:deb/debian/wget?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.25.0-2",
"1.25.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16599.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56154 · Revision 1
- Added to Heist Feed
- Publisher date