VDB
ALPINE-CVE-2026-34978
ALPINE-CVE-2026-34978
PUBLISHED
CVSS 6.5 MEDIUM
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.
Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.22 | cups | 0, 1.4.2-r0, 1.4.2-r1 |
| Alpine:v3.23 | cups | 2.4.3-r1, 1.4.1-r0, 1.4.2-r0 |
| Alpine:v3.20 | cups | 1.4.1-r0, 1.4.2-r0, 1.4.2-r1 |
| Alpine:v3.21 | cups | 1.4.1-r0, 1.4.2-r0, 1.4.2-r1 |
Timeline
- Apr 3, 2026 CVE Published
- Apr 29, 2026 CVE Updated
- Apr 30, 2026 Distribution Patch