CVE-2026-96757

EUVD-2026-85407
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.
Code Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
orvalorval
6.7.1 ≤
𝑥
< 8.29.0
CNA
Common Weakness Enumeration
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