How severe is GHSA-88f2-fpv8-89q2?

No CVSS score has been assigned to GHSA-88f2-fpv8-89q2 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-88f2-fpv8-89q2?

GHSA-88f2-fpv8-89q2 affects the following packages: orval (npm). Ecosystems affected: npm.

How do I fix GHSA-88f2-fpv8-89q2?

Update orval to 8.21.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-88f2-fpv8-89q2 is resolved across your whole dependency graph.

How do I detect GHSA-88f2-fpv8-89q2 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for orval, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-88f2-fpv8-89q2 if there is no patch (or I can't update yet)?

Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Is GHSA-88f2-fpv8-89q2 actively exploited in the wild?

No public exploit code has been indexed for GHSA-88f2-fpv8-89q2 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-88f2-fpv8-89q2?

GHSA-88f2-fpv8-89q2 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 50th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-88f2-fpv8-89q2?

GHSA-88f2-fpv8-89q2 is classified as Code Injection (CWE-94), CWE-116 (CWE-116), CWE-1336 (CWE-1336). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-88f2-fpv8-89q2 published, and has it been updated?

GHSA-88f2-fpv8-89q2 was published on September 3, 2026 and was last updated on September 18, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

GHSA-88f2-fpv8-89q2 — orval

Fix: orval-labs/orval#3692

GHSA-88f2-fpv8-89q2 is a Code Injection vulnerability in orval. A fix is available for orval — see the affected versions and patch details below.

Orval: RCE via servers[].url -> unescaped request-URL template literal (with getBaseUrlFromSpecification)

Also known asCVE-2026-62682

Published

Sep 3, 2026

Updated

Sep 18, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA’s SSVC triage for GHSA-88f2-fpv8-89q2.

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs50th percentile — riskier than 50% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

29other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

orvalnpm

2.9Mdownloads / week

Description

Summary

When 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.

Details

return `http://api.x/` + (globalThis.X = require("fs").writeFileSync("/marker","pwned")) + `/v1/u`;

Prerequisite: 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).

PoC

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.

Impact

With that option enabled, code execution in any environment that calls a client generated from an attacker-controlled or attacker-influenced OpenAPI description.

Suggested fix

Escape 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. maintainer-report.txt make_spec.py reproduce.sh

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`orval`	all versions	8.21.0`npm install orval@8.21.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for orval, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update orval to 8.21.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-88f2-fpv8-89q2 is resolved across your whole dependency graph.
Workarounds
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

### Summary When 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. ### Details ```ts return `http://api.x/` + (globalThis.X = require("fs").writeFileSync("/marker","pwned")

O3 Security · Impact-Aware SCA

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