CVE-2026-87876

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.

CVSS 3.1

3.0CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-25)

CWE

CWE-178

Published

2026-09-09

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

References

• https://access.redhat.com/errata/RHSA-2026:67568
• https://access.redhat.com/security/cve/CVE-2026-87876
• https://bugzilla.redhat.com/show_bug.cgi?id=2530991
• https://github.com/OpenPrinting/cups/commit/88e67c00c130a45f3a1edf36686f7a0b2982fef8
• https://github.com/OpenPrinting/cups/commit/f56844dbe4a54a9f8e1aeb3b913fbee614156bdb

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