Is CVE-2026-116811 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-116811 being exploited in the wild.

How severe is CVE-2026-116811?

High severity, with a CVSS score of 8.8, published 27 October 2026.

Is there a fix for CVE-2026-116811?

Yes: fixed in OpenPanel 3.0.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-116811 attacked?

It is attacked over the network.

Am I affected by CVE-2026-116811?

Check whether you run OpenPanel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-116811: OpenPanel sandbox escape in JavaScript template validator

CVE-2026-116811 · Severity: high · CVSS 8.8 · Published 2026-10-27

OpenPanel is a web analytics platform that allows project members to attach JavaScript templates to webhook integrations for data processing. A flaw in the template validator allows attackers with write access to bypass security checks and execute arbitrary code with the privileges of the worker process, which has access to databases, credentials, and third-party integrations. An exploit requires only template write access and can fully compromise the worker process.

Technologies: OpenPanel. Vendors: OpenPanel.

Quick answers

Is CVE-2026-116811 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-116811 being exploited in the wild.
How severe is CVE-2026-116811?: High severity, with a CVSS score of 8.8, published 27 October 2026.
Which products and versions are affected?: OpenPanel before 3.0.0.
Is there a fix for CVE-2026-116811?: Yes: fixed in OpenPanel 3.0.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116811 attacked?: It is attacked over the network.
Am I affected by CVE-2026-116811?: Check whether you run OpenPanel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: OpenPanel 3.0.0

Technical details

The JavaScript AST validator in packages/js-runtime/src/validate.ts blocks dangerous operations like calling the Function constructor, but the restrictions are not consistently enforced across all code paths. An attacker can read the forbidden property payload.constructor.constructor into a local variable, which defeats the member-expression-only checks, then call the local to obtain the Function constructor and execute arbitrary code. The vulnerability exists in the js-runtime validator component and affects all webhook JavaScript templates; execution happens in the worker process via new Function().

Affected products

OpenPanel OpenPanel before 3.0.0

Timeline

2026-10-27: disclosed
2026-09-22: patched

References

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