CVE-2026-87876

EUVD-2026-75089
Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3 LOW
ADJACENT_NETWORK
LOW
LOW
CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Debian logo
Debian Releases
Debian Product
Codename
cups
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
vulnerable
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2026-87876
https://bugzilla.redhat.com/show_bug.cgi?id=2530991
https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2
https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2