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Vulnerability details

CVE-2026-71871

orval-labs orval

Orval: Import-time RCE via header-parameter default -> zod module-level template literal

CVSS 4.0
9.3Critical

Official description

Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in a header parameter default is emitted into a module-level template literal emitted by zod schema generation without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts function formatDefaultValue. This issue is fixed in version 8.21.0.

CVSS scores

ScoreVersionSourceVector
9.3Critical 4.0 CVEProject cvelistV5 (CNA) (GitHub_M) 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

Affected products

VendorProductVersionsSource
orval-labs orval < 8.21.0 CVEProject cvelistV5 (CNA)

References and advisories

4
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Details

Published
2026-08-19
Last updated
2026-08-22
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.65%
Probability of exploitation in 30 days
51.5%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-94
    Improper Control of Generation of Code ('Code Injection')
  • CWE-116
    Improper Encoding or Escaping of Output
  • CWE-1336
    Improper Neutralization of Special Elements Used in a Template Engine