Is CVE-2026-96755 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-96755 being exploited in the wild.

How severe is CVE-2026-96755?

Critical severity, with a CVSS score of 9.8, published 23 September 2026.

Which products and versions are affected?

Orval Labs @Orval/Effect 8.14.0 through 8.28.1.

Is there a fix for CVE-2026-96755?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-96755 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-96755?

Check whether you run Orval Labs @Orval/Effect 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-2026-96755: orval @orval/effect code injection in OpenAPI schema defaults

CVE-2026-96755 · Severity: critical · CVSS 9.8 · Published 2026-09-23

orval is a code generator that creates typed client libraries from OpenAPI specifications. The @orval/effect generator fails to sanitize OpenAPI schema default values, allowing attackers to inject arbitrary JavaScript code via template literal syntax (${...}). When code generated from a malicious specification is imported or built, the injected JavaScript executes at module scope, potentially compromising the build system or application.

Vendors: Orval Labs.

Quick answers

Is CVE-2026-96755 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-96755 being exploited in the wild.
How severe is CVE-2026-96755?: Critical severity, with a CVSS score of 9.8, published 23 September 2026.
Which products and versions are affected?: Orval Labs @Orval/Effect 8.14.0 through 8.28.1.
Is there a fix for CVE-2026-96755?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-96755 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-96755?: Check whether you run Orval Labs @Orval/Effect 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.

Technical details

The vulnerability is a code injection flaw in the @orval/effect package that converts OpenAPI schema defaults into template literals without proper escaping. An attacker can craft an OpenAPI specification with defaults containing ${...} expressions that execute as JavaScript at module scope during code generation. No authentication is required; the attack surface depends on whether the application imports generated code from untrusted or user-controlled OpenAPI specifications.

Affected products

orval-labs @orval/effect 8.14.0 through 8.28.1

Timeline

2026-09-23: disclosed

References

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