Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-62681Orval: RCE via OpenAPI path -> unescaped request-URL template literal (backtick breakout)

Critical 9.3

In plain English

A critical-severity code injection in orval from orval-labs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.7%top 48.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, an unescaped backtick in an OpenAPI path is emitted into request URL template literals generated for axios, fetch, react-query, and SWR clients without safe encoding. This permits attacker-controlled JavaScript to be evaluated when a generated request, URL-builder, or query-key function is called, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/core/src/getters/route.ts and route generation consumers. This issue is fixed in version 8.21.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	orval	8.21.0	GHSA-fg9p-mrxr-hvq7

Affected products (as reported)

Vendor	Product	Versions
orval-labs	orval	< 8.21.0

Weakness: CWE-94, CWE-116, CWE-1336 · Vector: 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

References

https://github.com/orval-labs/orval/security/advisories/GHSA-fg9p-mrxr-hvq7 x_refsource_CONFIRM
https://github.com/orval-labs/orval/pull/3692 x_refsource_MISC
https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6 x_refsource_MISC
https://github.com/orval-labs/orval/releases/tag/v8.21.0 x_refsource_MISC