CVE-2026-96755Public exploitNetwork attack vectorHinoki check available

Arbitrary code execution via reactivated template interpolation

Published Sep 23, 2026 · Updated Sep 23, 2026

Code injection in Orval 8.14.0 through 8.28.1 allows remote attackers to execute arbitrary code through a crafted OpenAPI schema default. In @orval/effect, packages/effect/src/index.ts replaces the single-quote delimiters around an escaped default with backticks without re-escaping dollar-brace expressions, turning the default into live module-scope interpolation. Exploitation requires attacker control of the OpenAPI document and occurs when generated Effect schema code is built or imported, granting command execution in the developer or CI environment.

CVSS severity10.0
Critical
EPSS probability0.42%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Code injection in Orval 8.14.0 through 8.28.1 allows remote attackers to execute arbitrary code through a crafted OpenAPI schema default. In @orval/effect, packages/effect/src/index.ts replaces the single-quote delimiters around an escaped default with backticks without re-escaping dollar-brace expressions, turning the default into live module-scope interpolation. Exploitation requires attacker control of the OpenAPI document and occurs when generated Effect schema code is built or imported, granting command execution in the developer or CI environment.

The record

CVE
CVE-2026-96755
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Orval
Product
Orval
Classifications
CWE-94, T1195.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.14.0 <8.29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Orval · Orvalversion=8.14.0 <8.29.0

Published CVSS scores

10.0GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1195.001Compromise Software Dependencies and Development Tools

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started