CVE-2026-33331CWE-79

oRPC: Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify

High · published March 24, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
28.0
In the wild
Unconfirmed
What it is

oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to version 1.13.9, a stored cross-site scripting (XSS) vulnerability exists in the OpenAPI documentation generation of orpc. If an attacker can control any field within the OpenAPI specification (such as info.description), they can break out of the JSON context and execute arbitrary JavaScript when a user views the generated API documentation. This issue has been patched in version 1.13.9.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00355 · 28.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-03-24T19:18Z
EPSS history
Timeline
  • 24 MAR 19:18Z
    oRPC: Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
    cvelistv5