CVE-2026-96757

critical · 9.3

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.

9.3

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-23

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-94

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-96757