CVE-2026-96757

Description

orval before 8.29.0 fails to escape OpenAPI media-type keys when emitting them into single-quoted Content-Type string literals in generated code. Attackers can inject JavaScript through crafted media-type keys in OpenAPI specifications that executes when generated fetch operations or mock resolvers are invoked.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: CRITICAL
CVSS score: 9.3 / 10
CVSS 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
Effective score: 9.3 / 10 CRITICAL source: CNA overview
CWE(s): CWE-94
Reserved: 2026-09-23
Published: 2026-09-23 16:23 UTC
Last updated: 2026-09-23 17:48 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/96xxx/CVE-2026-96757.json
Linked Threat: CVE-2026-96757 — orval before 8.29.0 Code Injection via unescaped OpenAPI media-type

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 17:17:24 UTC
NVD last modified: 2026-09-23 18:17:12 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: disclosure@vulncheck.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85407
Assigner: VulnCheck
Published: Sep 23, 2026, 4:23:55 PM
Updated: Sep 23, 2026, 5:48:29 PM
EUVD base score (CVSS 4.0): 9.3 / 10
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
EUVD-reported EPSS: 0.0000
Vendors: orval-labs
Products: orval (6.7.1 <8.29.0)
Aliases: GHSA-2hg7-crf6-4xp2

ENISA description: orval before 8.29.0 fails to escape OpenAPI media-type keys when emitting them into single-quoted Content-Type string literals in generated code. Attackers can inject JavaScript through crafted media-type keys in OpenAPI specifications that executes when generated fetch operations or mock resolvers are invoked.

EUVD references (8)

Affected products (1)

Vendor	Product	Versions	Platforms
orval-labs	orval	`6.7.1` (affected), `8.29.0` (unaffected)	—

Vendor references (8)

References embedded in the original CVE record by the assigning CNA.

GitHub Security Advisory (GHSA-4q3x-rqfw-3x8p) vendor-advisory
GitHub Security Advisory (GHSA-rcpr-mq4m-jx9j) vendor-advisory
https://github.com/orval-labs/orval/pull/4007 patchissue-tracking
https://github.com/orval-labs/orval/commit/43af282d62dca0ef3140023741fb768f6a718adb patch
https://github.com/orval-labs/orval/commit/a2d4af59f3b167dc8a7a65d15f51cdb89ebe2fe5 patch
https://github.com/orval-labs/orval/blob/v8.28.1/packages/fetch/src/index.ts#L584 technical-description
https://github.com/orval-labs/orval product
VulnCheck Advisory: orval before 8.29.0 Code Injection via unescaped OpenAPI media-type third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (9)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/orval-labs/orval disclosure@vulncheck.com
https://github.com/orval-labs/orval/blob/v8.28.1/packages/fetch/src/index.ts#L584 disclosure@vulncheck.com
https://github.com/orval-labs/orval/commit/43af282d62dca0ef3140023741fb768f6a718adb disclosure@vulncheck.com
https://github.com/orval-labs/orval/commit/a2d4af59f3b167dc8a7a65d15f51cdb89ebe2fe5 disclosure@vulncheck.com
https://github.com/orval-labs/orval/pull/4007 disclosure@vulncheck.com
https://github.com/orval-labs/orval/security/advisories/GHSA-4q3x-rqfw-3x8p disclosure@vulncheck.com
https://github.com/orval-labs/orval/security/advisories/GHSA-4q3x-rqfw-3x8p 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://github.com/orval-labs/orval/security/advisories/GHSA-rcpr-mq4m-jx9j disclosure@vulncheck.com
https://www.vulncheck.com/advisories/orval-before-8.29.0-code-injection-via-unescaped-openapi-media-type disclosure@vulncheck.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft and Adobe Patch Tuesday, August 2026 Security Update Review

web:blog.qualys.com

The August 2026 Microsoft Patch Tuesday release delivers security fixes for vulnerabilities affecting a wide range of Microsoft products and services.

2026-09-24 11:07 UTC
CVE-2026-96757 - orval before 8.29.0 Code Injection via unescaped ...

web:cvefeed.io

The following list is the news that have been mention CVE-2026-96757 vulnerability anywhere in the article. Results are limited to the first 20 news articles due to potential performance issues. The following table lists the changes that have been made to the CVE-2026-96757 vulnerability over time.

2026-09-24 11:07 UTC
CVE-2026-96757: Orval Remote Code Execution - CVETodo

web:cvetodo.com

CVE-2026-96757 is a CVSS 9.8 Remote Code Execution vulnerability in Orval. See exploitation status, patch guidance, and technical details.

2026-09-24 11:07 UTC
CVE-2026-96757 - Exploits & Severity - Feedly

web:feedly.com

CVE ID : CVE-2026-96757 Published : Sept. 23, 2026 , 4:23 p.m. 31 minutes ago Description : orval before 8.29.0 fails to escape OpenAPI media-type keys when emitting them into single-quoted Content-Type string literals in generated code.

2026-09-24 11:07 UTC
CVE-2026-96757: Product identification pending

web:itknowledgebases.com

Export to CSV for reporting, ticketing, or patch prioritization workflows. What Is a CVE Advisory? A CVE (Common Vulnerabilities and Exposures) advisory is a public disclosure of a security vulnerability assigned a unique identifier by MITRE. Advisories include severity scores (CVSS), affected versions, and remediation guidance.

2026-09-24 11:07 UTC
Security Update Guide - Microsoft Security Response Center

web:portal.msrc.microsoft.com

Security Update Guide - Microsoft Security Response Center

2026-09-24 11:07 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:07 UTC
Description of the security update for Office 2016: August 11, 2026 ...

web:support.microsoft.com

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...

2026-09-24 11:07 UTC
August's Patch Tuesday is a monster: 751 fixes, with an exploited ...

web:www.computerworld.com

August's Patch Tuesday is a big one: 751 fixes, an exploited WinSock flaw and plenty of critical Windows, Office and Exchange issues.

2026-09-24 11:07 UTC
Patch Tuesday September 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-09-24 11:07 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-96757.json.

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