CVE-2026-87876

LOWPre-NVD 3.03.0—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.0 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:redhat, epss
Trending — 3 sources updated this weekElevated
3.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
3.0
EG Score
3.0(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity30% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

References (5)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 04:14 UTCEG score recompute
  2. 2026-09-19 04:14 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-16 14:09 UTCEPSS rescore
  6. 2026-09-16 08:54 UTCEG score recompute
  7. 2026-09-16 08:54 UTCVendor advisory
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-13 16:48 UTCEPSS rescore
  11. 2026-09-13 12:50 UTCEG score recompute
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 17:30 UTCEG score recompute
  15. 2026-09-10 00:32 UTCEG score recompute
  16. 2026-09-09 23:25 UTCEG score recompute
  17. 2026-09-09 19:29 UTCEG score recompute
  18. 2026-09-09 18:21 UTCEG score recompute
  19. 2026-09-09 17:28 UTCEG score recompute
  20. 2026-09-09 16:28 UTCEG score recompute
  21. 2026-09-09 16:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-87876?
CVE-2026-87876 is a low vulnerability published on September 9, 2026. 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.
When was CVE-2026-87876 disclosed?
CVE-2026-87876 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87876 actively exploited?
CVE-2026-87876 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.1% of all scored CVEs.
What is the CVSS score of CVE-2026-87876?
CVE-2026-87876 has a CVSS v4.0 base score of 3.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-87876?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87876, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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