CVE-2026-57518

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

Pagekit CMS 1.0.18 contains a privilege escalation vulnerability that allows authenticated users with the 'user: manage users' permission to escalate privileges by assigning arbitrary custom roles to themselves due to missing authorization checks in UserApiController::saveAction(). Attackers can assign themselves a custom role with the 'system: manage packages' permission and then upload and install a malicious PHP package through the admin package installer to achieve remote code execution.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
37.9%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Pagekit CMS 1.0.18 Privilege Escalation via UserApiController | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pagekit-cms-privilege-escalation-via-userapicontroller
generic🟡 PoC Available

CVE-2026-57518 — Pagekit CMS 1.0.18 Privilege Escalation to RCE · GitHub

https://gist.github.com/sermikr0/6f0a67e9d101746fcdb04827de137847

Vendor Advisories for CVE-2026-57518(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 40× in last 7d / 59× 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. 2026-07-07 02:56 UTCEG score recompute
  2. 2026-07-07 02:56 UTCGHSA enrichment
  3. 2026-07-06 16:06 UTCEG score recompute
  4. 2026-07-06 16:06 UTCGHSA enrichment
  5. 2026-07-06 05:12 UTCEG score recompute
  6. 2026-07-06 05:12 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 18:21 UTCEG score recompute
  10. 2026-07-05 18:21 UTCGHSA enrichment
  11. 2026-07-05 07:30 UTCEG score recompute
  12. 2026-07-05 07:30 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 20:41 UTCEG score recompute
  16. 2026-07-04 20:41 UTCGHSA enrichment
  17. 2026-07-04 09:52 UTCEG score recompute
  18. 2026-07-04 09:51 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 22:59 UTCEG score recompute
  22. 2026-07-03 22:59 UTCGHSA enrichment
  23. 2026-07-03 12:09 UTCEG score recompute
  24. 2026-07-03 12:09 UTCGHSA enrichment
  25. 2026-07-03 01:08 UTCEG score recompute
Show 34 more
  1. 2026-07-03 01:08 UTCGHSA enrichment
  2. 2026-07-02 14:20 UTCEG score recompute
  3. 2026-07-02 14:20 UTCGHSA enrichment
  4. 2026-07-02 03:30 UTCEG score recompute
  5. 2026-07-02 03:30 UTCGHSA enrichment
  6. 2026-07-01 16:41 UTCEG score recompute
  7. 2026-07-01 16:41 UTCGHSA enrichment
  8. 2026-07-01 15:07 UTCEPSS rescore
  9. 2026-07-01 05:52 UTCEG score recompute
  10. 2026-07-01 05:52 UTCGHSA enrichment
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 19:02 UTCEG score recompute
  13. 2026-06-30 19:01 UTCGHSA enrichment
  14. 2026-06-30 08:12 UTCEG score recompute
  15. 2026-06-30 08:12 UTCGHSA enrichment
  16. 2026-06-29 21:24 UTCEG score recompute
  17. 2026-06-29 21:24 UTCGHSA enrichment
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 10:35 UTCEG score recompute
  20. 2026-06-29 10:35 UTCGHSA enrichment
  21. 2026-06-28 23:46 UTCEG score recompute
  22. 2026-06-28 23:46 UTCGHSA enrichment
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 12:57 UTCEG score recompute
  25. 2026-06-28 12:57 UTCGHSA enrichment
  26. 2026-06-28 04:56 UTCEPSS rescore
  27. 2026-06-28 02:09 UTCEG score recompute
  28. 2026-06-28 02:09 UTCGHSA enrichment
  29. 2026-06-27 15:20 UTCEG score recompute
  30. 2026-06-27 15:20 UTCGHSA enrichment
  31. 2026-06-27 04:31 UTCEG score recompute
  32. 2026-06-27 04:30 UTCGHSA enrichment
  33. 2026-06-26 17:41 UTCEG score recompute
  34. 2026-06-26 17:41 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-57518?
CVE-2026-57518 is a high vulnerability published on June 26, 2026. Pagekit CMS 1.0.18 contains a privilege escalation vulnerability that allows authenticated users with the 'user: manage users' permission to escalate privileges by assigning arbitrary custom roles to themselves due to missing authorization checks in UserApiController::saveAction(). Attackers can…
When was CVE-2026-57518 disclosed?
CVE-2026-57518 was first published in the National Vulnerability Database on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57518 actively exploited?
CVE-2026-57518 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57518?
CVE-2026-57518 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-57518?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57518, 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.

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