by Kastro
Paper/Archive/CVE-2026-71867

CVE-2026-71867

orval-labs orval — Orval: RCE via schema property name -> computed-property-key injection in the MSW mock generator

EPSS 0.7%public exploitCVSS 9.3
critical.is priorityof 100
48
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 51.3.513 × 2010.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a single quote in a schema property name is emitted into single-quoted object keys in generated MSW mock factories without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated mock factory is called by tests or an MSW handler, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/core/src/getters/keys.ts function getKey and MSW mock generation. This issue is fixed in version 8.21.0.

Affected

ProductAffectedFixed inSource
orval< 8.21.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/orval-labs/orval/security/advisories/GHSA-2w86-xfrc-g85rrefgithub.com/orval-labs/orval/pull/3692refgithub.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6refgithub.com/orval-labs/orval/releases/tag/v8.21.0