PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-53676 ThingsBoard CVE debrief

CVE-2026-53676 is a high-severity vulnerability in ThingsBoard that allows for arbitrary code execution within a sandboxed context by a user with tenant administrator privileges. The vulnerability is caused by a prototype pollution issue. This issue can lead to significant operational impact, especially in environments where tenant administrator privileges are widespread. Users should review their exposure and apply mitigations promptly.

Vendor
ThingsBoard
Product
Unknown
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-22
Advisory published
2026-06-17
Advisory updated
2026-06-22

Who should care

Users of ThingsBoard, especially those with tenant administrator privileges, should be aware of this vulnerability and take steps to mitigate it. Security teams and platform administrators should prioritize patching or applying recommended mitigations to prevent potential exploitation. Vulnerability management and security teams should review the affected scope and implement additional security controls if necessary.

Technical summary

The vulnerability exists in ThingsBoard and allows users with tenant administrator privileges to execute arbitrary code within a sandboxed context due to a prototype pollution issue. The CVSS score for this vulnerability is 8.6, indicating a high severity level. Affected systems may face significant risk if tenant administrators' accounts are compromised or if internal threat actors exploit this vulnerability. Implementing compensating controls and closely monitoring affected systems is crucial.

Defensive priority

High

Recommended defensive actions

  • Apply the vendor-provided patch or update to the latest version of ThingsBoard.
  • Restrict access to the affected system to only trusted users.
  • Monitor the system for suspicious activity.
  • Consider implementing additional security controls, such as input validation and sanitization.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record was published on 2026-06-17T23:17:04.870Z and was last modified on 2026-06-22T19:49:09.490Z. The NVD entry is currently Deferred. Evidence is limited to public sources and may not reflect the full scope of affected systems or potential impacts. Defenders should verify the vulnerability's existence and potential impact within their environments.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53676 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53676

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53676 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53676

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.