CVE-2026-62682: Orval Remote Code Execution Vulnerability
CRITICALCVE-2026-62682 is a CRITICAL remote code execution vulnerability (CWE-116: Improper Encoding or Escaping of Output) affecting Orval libraries in the npm ecosystem. The issue involves rce via servers[].url -> unescaped request-url template literal (with getbaseurlfromspecification). Remediation is available by upgrading affected packages to version 8.21.0.
CVE-2026-62682 at a Glance
How to Fix CVE-2026-62682
To remediate this vulnerability, upgrade all affected Orval dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install orval@8.21.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls orvalHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-62682, inspect your project dependencies using npm:
npm ls orvalAnalyze the terminal output to locate any version of Orval in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.21.0), your application is affected.
Note: The npm ls orval command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-116: Improper Encoding or Escaping of Output, where the product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. as a result, the intended structure of the message is not preserved. In Orval, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-62682 Affected Orval Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
orval
|
npm |
< 8.21.0
|
8.21.0
|
References
Frequently Asked Questions
What is CVE-2026-62682?
Which Orval versions are affected?
What version fixes CVE-2026-62682?
Is orval affected?
What CWE is associated with CVE-2026-62682?
How can I check npm dependencies for CVE-2026-62682?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-88f2-fpv8-89q2",
"modified" : "2026-09-03T19:06:52Z",
"published" : "2026-09-03T19:06:52Z",
"aliases" : [ "CVE-2026-62682" ],
"summary" : "Orval: RCE via servers[].url -> unescaped request-URL template literal (with getBaseUrlFromSpecification)",
"details" : "### Summary\n\nWhen Orval is configured with `output.baseUrl.getBaseUrlFromSpecification: true`, it bakes the spec's `servers[0].url` into the generated request URL as a template literal without escaping the backtick. A server URL containing a backtick closes the template literal and injects a concatenation expression evaluated when the generated URL/request function is called, executing attacker-controlled code. Verified on Orval 8.19.0 (fetch client); survives default OpenAPI validation.\n\n### Details\n\n```ts\nreturn `http://api.x/` + (globalThis.X = require(\"fs\").writeFileSync(\"/marker\",\"pwned\")) + `/v1/u`;\n```\n\nPrerequisite: the documented `getBaseUrlFromSpecification: true` option (takes the base URL from the OpenAPI servers block). This is the same output sink as the route-path case (request-URL template literal) reached via the server `url` field. Distinct from Orval's published CVEs (CVE-2026-22785 summary/MCP, CVE-2026-23947 / CVE-2026-25141 x-enumDescriptions, CVE-2026-24132 const/mock).\n\n### PoC\n\n`reproduce.sh` (+ `make_spec.py`) attached: generates a fetch client with `getBaseUrlFromSpecification: true`, bundles it, calls the functions, and shows a marker written. Verified on 8.19.0.\n\n### Impact\n\nWith that option enabled, code execution in any environment that calls a client generated from an attacker-controlled or attacker-influenced OpenAPI description.\n\n### Suggested fix\n\nEscape the server URL before emitting it into the URL template literal (escape backtick and `${`), or build the base URL with an encoder that treats it as data; validate the URL.\n[maintainer-report.txt](https://github.com/user-attachments/files/29396562/maintainer-report.txt)\n[make_spec.py](https://github.com/user-attachments/files/29396563/make_spec.py)\n[reproduce.sh](https://github.com/user-attachments/files/29396564/reproduce.sh)",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "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" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "orval"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.21.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/orval-labs/orval/security/advisories/GHSA-88f2-fpv8-89q2"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-62682"
}, {
"type" : "WEB",
"url" : "https://github.com/orval-labs/orval/pull/3692"
}, {
"type" : "WEB",
"url" : "https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/orval-labs/orval"
}, {
"type" : "WEB",
"url" : "https://github.com/orval-labs/orval/releases/tag/v8.21.0"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-116", "CWE-1336", "CWE-94" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2026-09-03T19:06:52Z",
"nvd_published_at" : "2026-08-19T18:16:54Z"
}
}