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Vulnerability record · CVE-2026-96757 · published 23 September 2026

CVE-2026-96757: Code injection vulnerability

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 4.0 Critical EPSS 0.57% · top 55.3% CWE-94 · Code injection Deferred
9.3CVSS 4.0 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
9References
23 Sep 2026Last modified by NVD

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.

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:

References

LinkTags
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

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Source: NIST National Vulnerability Database (record CVE-2026-96757), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.