DEBIAN-CVE-2026-34978
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, the RSS notifier allows .. path traversal in notify-recipient-uri (e.g., rss:///../job.cache), letting a remote IPP client write RSS XML bytes outside CacheDir/rss (anywhere that is lp-writable). In particular, because CacheDir is group-writable by default (typically root:lp and mode 0770), the notifier (running as lp) can replace root-managed state files via temp-file + rename(). This PoC clobbers CacheDir/job.cache with RSS XML, and after restarting cupsd the scheduler fails to parse the job cache and previously queued jobs disappear. At time of publication, there are no publicly available patches.
DEBIAN-CVE-2026-34978
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-2026-34978
cups
Source reference: /affected/0/package/name
- Affected versions
- 2.4.10-1
Source reference:
/affected/0/versions2.4.10-2Source reference:
/affected/0/versions2.4.10-3Source reference:
/affected/0/versions2.4.10-4Source reference:
/affected/0/versions2.4.14-1Source reference:
/affected/0/versions2.4.15-1Source reference:
/affected/0/versions2.4.16-1Source reference:
/affected/0/versions2.4.17-1Source reference:
/affected/0/versions2.4.18-1Source reference:
/affected/0/versions2.4.2-3Source reference:
/affected/0/versions2.4.2-3+deb12u1Source reference:
/affected/0/versions2.4.2-3+deb12u2Source reference:
/affected/0/versions2.4.2-3+deb12u3Source reference:
/affected/0/versions2.4.2-3+deb12u4Source reference:
/affected/0/versions2.4.2-3+deb12u5Source reference:
/affected/0/versions2.4.2-3+deb12u6Source reference:
/affected/0/versions2.4.2-3+deb12u7Source reference:
/affected/0/versions2.4.2-3+deb12u8Source reference:
/affected/0/versions2.4.2-3+deb12u9Source reference:
/affected/0/versions2.4.2-4Source reference:
/affected/0/versions2.4.2-5Source reference:
/affected/0/versions2.4.2-6Source reference:
/affected/0/versions2.4.7-1Source reference:
/affected/0/versions2.4.7-1.1Source reference:
/affected/0/versions2.4.7-1.2Source reference:
/affected/0/versions2.4.7-2Source reference:
/affected/0/versions2.4.7-3Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cups
Source reference: /affected/1/package/name
- Affected versions
- 2.4.10-3
Source reference:
/affected/1/versions2.4.10-3+deb13u1Source reference:
/affected/1/versions2.4.10-3+deb13u2Source reference:
/affected/1/versions2.4.10-4Source reference:
/affected/1/versions2.4.14-1Source reference:
/affected/1/versions2.4.15-1Source reference:
/affected/1/versions2.4.16-1Source reference:
/affected/1/versions2.4.17-1Source reference:
/affected/1/versions2.4.18-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cups
Source reference: /affected/2/package/name
- Affected versions
- 2.4.10-3
Source reference:
/affected/2/versions2.4.10-4Source reference:
/affected/2/versions2.4.14-1Source reference:
/affected/2/versions2.4.15-1Source reference:
/affected/2/versions2.4.16-1Source reference:
/affected/2/versions - Fixed versions
- 2.4.17-1
Source reference:
/affected/2/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"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:deb/debian/cups?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.4.10-1",
"2.4.10-2",
"2.4.10-3",
"2.4.10-4",
"2.4.14-1",
"2.4.15-1",
"2.4.16-1",
"2.4.17-1",
"2.4.18-1",
"2.4.2-3",
"2.4.2-3+deb12u1",
"2.4.2-3+deb12u2",
"2.4.2-3+deb12u3",
"2.4.2-3+deb12u4",
"2.4.2-3+deb12u5",
"2.4.2-3+deb12u6",
"2.4.2-3+deb12u7",
"2.4.2-3+deb12u8",
"2.4.2-3+deb12u9",
"2.4.2-4",
"2.4.2-5",
"2.4.2-6",
"2.4.7-1",
"2.4.7-1.1",
"2.4.7-1.2",
"2.4.7-2",
"2.4.7-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34978.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:deb/debian/cups?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.4.10-3",
"2.4.10-3+deb13u1",
"2.4.10-3+deb13u2",
"2.4.10-4",
"2.4.14-1",
"2.4.15-1",
"2.4.16-1",
"2.4.17-1",
"2.4.18-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34978.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.17-1"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:deb/debian/cups?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.4.10-3",
"2.4.10-4",
"2.4.14-1",
"2.4.15-1",
"2.4.16-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34978.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55980 · Revision 1
- Added to Heist Feed
- Publisher date