CVE-2026-53676
Prototype pollution enables RCE for TENANT_ADMIN in ThingsBoard.
Is CVE-2026-53676 being exploited?
Not confirmed. CVE-2026-53676 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 0.60% probability of exploitation in the next 30 days.
How severe is CVE-2026-53676?
CVE-2026-53676 is rated High with a CVSS score of 8.6. 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-2026-53676?
Not known from our data. No patch reference has been recorded for CVE-2026-53676, 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-2026-53676 affect?
CVE-2026-53676 affects ThingsBoard. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53676?
Patch ASAP or upgrade to fixed release when available; monitor for updates.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated TENANT_ADMIN can execute arbitrary code in the platform sandbox.
Patch when possible
- affectedprior to v4.3.1.2
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.