CVE-2026-66748
Authenticated RCE in Camaleon CMS via select_eval custom field.
Is CVE-2026-66748 being exploited?
Not confirmed. CVE-2026-66748 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.83% probability of exploitation in the next 30 days.
How severe is CVE-2026-66748?
CVE-2026-66748 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-66748?
Not known from our data. No patch reference has been recorded for CVE-2026-66748, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-66748 affect?
CVE-2026-66748 affects Camaleon CMS 2.1.1 - 2.9.1, Ruby on Rails deployments running Camaleon CMS. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66748?
Remove custom_fields manage from untrusted users, audit/remove select_eval fields, and apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated remote code execution as web-server user by evaluating attacker-controlled Ruby in select_eval field during post edit rendering.
Immediate action required
- affected>= 2.1.1 and <= 2.9.1
- affected2.9.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.