What’s Vulnerable › Vulnerabilities

CVE-2026-96757: orval before 8.29.0 Code Injection via unescaped OpenAPI media-type

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-23 · updated 2026-09-23
• Weakness: CWE-94

Description

orval before 8.29.0 fails to escape OpenAPI media-type keys when emitting them into single-quoted Content-Type string literals in generated code. Attackers can inject JavaScript through crafted media-type keys in OpenAPI specifications that executes when generated fetch operations or mock resolvers are invoked.

Affected products

• orval-labs orval: from 6.7.1 before 8.29.0 — fixed in 8.29.0

How to fix

Upgrade to a fixed version: orval-labs orval 8.29.0. Check the vendor advisory for mitigations.

References

• https://github.com/orval-labs/orval
• https://github.com/orval-labs/orval/blob/v8.28.1/packages/fetch/src/index.ts#L584
• https://github.com/orval-labs/orval/commit/43af282d62dca0ef3140023741fb768f6a718adb
• https://github.com/orval-labs/orval/commit/a2d4af59f3b167dc8a7a65d15f51cdb89ebe2fe5
• https://github.com/orval-labs/orval/pull/4007
• https://github.com/orval-labs/orval/security/advisories/GHSA-4q3x-rqfw-3x8p
• https://github.com/orval-labs/orval/security/advisories/GHSA-rcpr-mq4m-jx9j
• https://www.vulncheck.com/advisories/orval-before-8.29.0-code-injection-via-unescaped-openapi-media-type
• https://github.com/orval-labs/orval/security/advisories/GHSA-4q3x-rqfw-3x8p

Get alerted when CVE-2026-96757 or the next vulnerability affects your stack