Description
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.
INFO
Published Date :
2026-04-03T21:15:15.921Z
Last Modified :
2026-04-06T15:42:42.322Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-34978 vulnerability.
| Vendors | Products |
|---|---|
| Openprinting |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34978.
