CVE-2026-66748

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-28. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
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.

Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom_fields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the select_eval custom field type. Attackers can store an attacker-controlled Ruby expression in the field options command parameter, which is evaluated via instance_eval within an ERB view whenever a post edit page is rendered, achieving server-side code execution with web server process privileges.

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
55%
KEV
Not listed

Published

July 28, 2026

Last Modified

August 14, 2026

Advisory Details (5)

Auto-updated Jul 28, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release.
generic

Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field | Advisories | VulnCheck

https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field
generic🟡 PoC Available

GitHub - theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field: Security Advisory: Camaleon CMS - Authenticated RCE via `select_eval` Custom Field · GitHub

https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field
github_release Patch Available

2.9.2

Patch available: owen2345/camaleon-cms 2.9.2

https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2
github_pr Patch Available

Add permissions for select eval management

Patch available: owen2345/camaleon-cms 2.9.2 (PR #1136 merged 2026-04-22)

https://github.com/owen2345/camaleon-cms/pull/1136
github_commit Patch Available

commit 158823668e2e (owen2345/camaleon-cms)

Patch available: owen2345/camaleon-cms 2.9.2 (contains commit 158823668e2e)

https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f

Vendor Advisories for CVE-2026-66748(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 21× in last 7d / 120× 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 140 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66748?
CVE-2026-66748 is a high vulnerability published on July 28, 2026. Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with customfields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the selecteval custom field type. Attackers can store an…
When was CVE-2026-66748 disclosed?
CVE-2026-66748 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66748 actively exploited?
CVE-2026-66748 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 45.3% of all scored CVEs.
What is the CVSS score of CVE-2026-66748?
CVE-2026-66748 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-66748?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66748, 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

Explore the affected products and dependency analysis for CVE-2026-66748

Explore →

Is Your Infrastructure Affected by CVE-2026-66748?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs