CVE-2026-40291
Privilege escalation to admin via writable roles in Chamilo LMS API
Is CVE-2026-40291 being exploited?
Not confirmed. CVE-2026-40291 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-40291?
CVE-2026-40291 is rated High with a CVSS score of 8.8. 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-2026-40291?
Yes. A fix has been recorded for CVE-2026-40291. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40291 affect?
CVE-2026-40291 affects Chamilo LMS < 2.0.0-RC.3. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40291?
Upgrade to 2.0.0-RC.3+; review and restrict role modifications.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated student can escalate to ROLE_ADMIN by changing roles via PUT /api/users/{id}, gaining full platform control.
Immediate action required
- affected< 2.0-RC.3
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.