Arbitrary Code Execution Vulnerability in Orval by Orval Labs
CVE-2026-23947

9.3CRITICAL

Key Information:

Vendor

Orval-labs

Status
Orval
Vendor
CVE Published:
20 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-23947?

Orval, a tool for generating type-safe JavaScript clients from OpenAPI specifications, has a vulnerability affecting versions 7.10.0 to 8.0.2, allowing arbitrary code execution. This flaw arises from inadequate handling of untrusted OpenAPI specifications, specifically through the x-enumDescriptions field, which permits the injection of unescaped TypeScript/JavaScript code into generated clients. This vulnerability impacts the const enum generation process, resulting in potentially executable code embedded in the generated schema files. A fix is available in Orval version 8.0.2.

Affected Version(s)

orval >= 8.0.0-rc.0, < 8.0.2 < 8.0.0-rc.0, 8.0.2

orval < 7.19.0 < 7.19.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-23947-PoC
Created by boroeurnprach

References

https://github.com/orval-labs/orval/security/advisories/G...
x_refsource_CONFIRM
https://github.com/orval-labs/orval/releases/tag/v8.0.2
x_refsource_MISC

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.