CVE-2026-57518

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM 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
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 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(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 14, 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 5× in last 7d / 63× 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.

Showing the most recent 100 of 226 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-04 05:07 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-30 19:21 UTCEG score recompute
  11. 2026-08-30 19:21 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-28 21:42 UTCEPSS rescore
  15. 2026-08-27 23:04 UTCEG score recompute
  16. 2026-08-27 23:04 UTCGHSA enrichment
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 21:49 UTCEG score recompute
  21. 2026-08-24 21:49 UTCGHSA enrichment
  22. 2026-08-24 05:32 UTCGHSA enrichment
  23. 2026-08-23 18:40 UTCGHSA enrichment
  24. 2026-08-23 07:51 UTCEG score recompute
  25. 2026-08-23 07:51 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-22 21:03 UTCGHSA enrichment
  3. 2026-08-22 09:32 UTCEG score recompute
  4. 2026-08-22 09:32 UTCGHSA enrichment
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-21 15:50 UTCGHSA enrichment
  7. 2026-08-21 04:55 UTCEG score recompute
  8. 2026-08-21 04:55 UTCGHSA enrichment
  9. 2026-08-20 22:55 UTCEPSS rescore
  10. 2026-08-20 17:38 UTCGHSA enrichment
  11. 2026-08-20 06:49 UTCEG score recompute
  12. 2026-08-20 06:49 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 10:56 UTCGHSA enrichment
  15. 2026-08-18 23:55 UTCEG score recompute
  16. 2026-08-18 23:55 UTCGHSA enrichment
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-17 11:25 UTCGHSA enrichment
  20. 2026-08-17 00:36 UTCEG score recompute
  21. 2026-08-17 00:36 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 13:47 UTCGHSA enrichment
  24. 2026-08-16 02:58 UTCEG score recompute
  25. 2026-08-16 02:58 UTCGHSA enrichment
  26. 2026-08-16 02:14 UTCEPSS rescore
  27. 2026-08-15 16:10 UTCGHSA enrichment
  28. 2026-08-15 05:21 UTCEG score recompute
  29. 2026-08-15 05:21 UTCGHSA enrichment
  30. 2026-08-15 01:30 UTCEPSS rescore
  31. 2026-08-14 18:32 UTCGHSA enrichment
  32. 2026-08-14 07:43 UTCEG score recompute
  33. 2026-08-14 07:43 UTCGHSA enrichment
  34. 2026-08-13 22:00 UTCEPSS rescore
  35. 2026-08-13 20:54 UTCGHSA enrichment
  36. 2026-08-13 10:06 UTCGHSA enrichment
  37. 2026-08-12 23:17 UTCEG score recompute
  38. 2026-08-12 23:17 UTCGHSA enrichment
  39. 2026-08-12 13:51 UTCEPSS rescore
  40. 2026-08-12 12:29 UTCGHSA enrichment
  41. 2026-08-12 01:40 UTCGHSA enrichment
  42. 2026-08-11 14:51 UTCEG score recompute
  43. 2026-08-11 14:51 UTCGHSA enrichment
  44. 2026-08-11 04:01 UTCEG score recompute
  45. 2026-08-11 04:01 UTCGHSA enrichment
  46. 2026-08-11 00:00 UTCEPSS rescore
  47. 2026-08-10 17:13 UTCGHSA enrichment
  48. 2026-08-10 04:55 UTCGHSA enrichment
  49. 2026-08-09 18:07 UTCEG score recompute
  50. 2026-08-09 18:07 UTCGHSA enrichment
  51. 2026-08-09 13:46 UTCEPSS rescore
  52. 2026-08-09 07:18 UTCGHSA enrichment
  53. 2026-08-08 20:30 UTCEG score recompute
  54. 2026-08-08 20:30 UTCGHSA enrichment
  55. 2026-08-08 16:37 UTCEPSS rescore
  56. 2026-08-08 09:41 UTCGHSA enrichment
  57. 2026-08-07 22:53 UTCEG score recompute
  58. 2026-08-07 22:53 UTCGHSA enrichment
  59. 2026-08-07 12:04 UTCGHSA enrichment
  60. 2026-08-07 01:16 UTCGHSA enrichment
  61. 2026-08-06 14:27 UTCEG score recompute
  62. 2026-08-06 14:27 UTCGHSA enrichment
  63. 2026-08-06 13:47 UTCEPSS rescore
  64. 2026-08-06 03:38 UTCEG score recompute
  65. 2026-08-06 03:38 UTCGHSA enrichment
  66. 2026-08-05 19:17 UTCEPSS rescore
  67. 2026-08-05 16:50 UTCGHSA enrichment
  68. 2026-08-05 01:52 UTCEG score recompute
  69. 2026-08-05 01:51 UTCGHSA enrichment
  70. 2026-08-04 15:10 UTCEPSS rescore
  71. 2026-08-04 14:57 UTCEG score recompute
  72. 2026-08-04 14:57 UTCGHSA enrichment
  73. 2026-08-04 10:39 UTCEPSS rescore
  74. 2026-08-04 00:45 UTCGHSA enrichment
  75. 2026-08-03 13:55 UTCEG score recompute

Related CVEs(same CWE)

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, with the most recent update on July 14, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 49.4% of all scored CVEs.
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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