ALPINE-CVE-2026-34990
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs. Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly available patches.
ALPINE-CVE-2026-34990
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:ALPINE-CVE-2026-34990
cups
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.4.18-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
cups
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.4.18-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
cups
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.4.18-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
cups
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.4.18-r0
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
cups
Source reference: /affected/4/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.4.18-r0
Source reference:
/affected/4/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": "2.4.18-r0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:apk/alpine/cups?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34990.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.18-r0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:apk/alpine/cups?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34990.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.18-r0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:apk/alpine/cups?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34990.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.18-r0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:apk/alpine/cups?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34990.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.18-r0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:apk/alpine/cups?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34990.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54312 · Revision 1
- Added to Heist Feed
- Publisher date