CVE-2026-66748 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-66748HIGH

owen2345 camaleon-cms — Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   H   H   H    8.7   .0080   53.9     —

AFFECTED
  Product       Versions  Fixed
  camaleon-cms  2.1.1 –   —

TIMELINE
  Jul 27  Reserved by VulnCheck
  Jul 28  Published (CNA: VulnCheck)
  Jul 29  EXPLOIT PUBLISHED — CVE-2026-66748 (owen2345 camaleon-cms). Public exploit reference added.
  Aug 13  EXPLOIT PUBLISHED — CVE-2026-66748 (owen2345 camaleon-cms). Public exploit reference added.

CWE-94 · CNA: VulnCheck · CVSS v4.0 · 7 references · NVD status: Deferred

Description

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
July 27, 2026	Reserved	Reserved by VulnCheck
July 28, 2026	Published	Published (CNA: VulnCheck)
July 29, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-66748 (owen2345 camaleon-cms). Public exploit reference added.
August 13, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-66748 (owen2345 camaleon-cms). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
owen2345	camaleon-cms	—	2.1.1	—

Weaknesses

CWE-94

References (7)

https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/ [technical-description, exploit]
https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f [patch]
https://github.com/owen2345/camaleon-cms/pull/1136 [issue-tracking]
https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2 [release-notes]
https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field [exploit, technical-description]
https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/ [technical-description, exploit]
https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field [third-party-advisory]

Authoritative record: CVE-2026-66748 at cve.org

Vendors: owen2345

Weaknesses: CWE-94

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66748 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.