CVE-2026-16337
Authenticated low-privilege users can escalate to admin and achieve RCE via OSGi bundle upload.
Is CVE-2026-16337 being exploited?
Not confirmed. CVE-2026-16337 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 0.55% probability of exploitation in the next 30 days.
How severe is CVE-2026-16337?
CVE-2026-16337 is rated Critical with a CVSS score of 9.4. 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-2026-16337?
Not known from our data. No patch reference has been recorded for CVE-2026-16337, 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-2026-16337 affect?
CVE-2026-16337 affects dotCMS 21.02 through 26.06.22-03 (all platforms), ToolGroupResource and RoleAjax REST/DWR endpoints, OSGi bundle upload functionality. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16337?
Restrict backend access, disable OSGi uploads, revoke suspicious accounts, apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated low-privileged backend user can self-grant CMS Administrator and upload a crafted OSGi bundle to execute arbitrary shell commands (remote code execution).
Immediate action required
- affected>= 21.02 and <= 26.06.22-03
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.