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Orval CVE-2026-23947

CRITICAL
Command Injection (CWE-77)
2026-01-20 security-advisories@github.com GHSA-h526-wf6g-67jv
Command Injection RCE Orval
9.8
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 20, 2026 - 01:15 nvd
CRITICAL 9.8

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 10 npm packages depend on @orval/core (10 direct, 0 indirect)

Ecosystem-wide dependent count for version 8.0.0-rc.0.

DescriptionGitHub Advisory

Orval generates type-safe JS clients (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification. Versions prior to 7.19.0 until 8.0.2 are vulnerable to arbitrary code execution in environments consuming generated clients. This issue is similar in nature to CVE-2026-22785, but affects a different code path in @orval/core that was not addressed by CVE-2026-22785's fix. The vulnerability allows untrusted OpenAPI specifications to inject arbitrary TypeScript/JavaScript code into generated clients via the x-enumDescriptions field, which is embedded without proper escaping in getEnumImplementation(). I have confirmed that the injection occurs during const enum generation and results in executable code within the generated schema files. Orval 7.19.0 and 8.0.2 contain a fix for the issue.

AnalysisAI

Orval, a TypeScript API client generator, has a command injection vulnerability that allows code execution through malicious OpenAPI specifications.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker crafts malicious OpenAPI spec
Exploit
Inject code via x-enumDescriptions field
Execution
Orval generates client with embedded code
Impact
Execute arbitrary JavaScript in consuming environment
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Vulnerability AssessmentAI

Exploitation Orval versions 7.19.0 through 8.0.2 processing untrusted OpenAPI/Swagger specifications with x-enumDescriptions field. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.8 — supply chain risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker publishes a malicious OpenAPI specification (e.g., on a public API registry). When a developer uses Orval to generate a TypeScript client from this spec, the injected commands execute on the developer's machine, potentially compromising CI/CD pipelines.
Remediation Update Orval to the patched version. … Detailed patch versions, workarounds, and compensating controls in full report.
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Within 24 hours: Identify all affected systems and apply vendor patches immediately. …

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CVE-2026-23947 vulnerability details – vuln.today
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