Advisoriesby IbisRed HatCVE-2026-87876
Two case-insensitive comparisons on request-derived usernames outside the main...
No fix yet
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat OpenShift Container Platform 4 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-178
- www.cve.org/CVERecord?id=CVE-2026-87876
- nvd.nist.gov/vuln/detail/CVE-2026-87876
- access.redhat.com/errata/RHSA-2026:67568
- access.redhat.com/security/cve/CVE-2026-87876
- bugzilla.redhat.com/show_bug.cgi?id=2530991
- github.com/OpenPrinting/cups/commit/88e67c00c130a45f3a1edf36686f7a0b2982fef8
- github.com/OpenPrinting/cups/commit/f56844dbe4a54a9f8e1aeb3b913fbee614156bdb
- github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2