CVE-2026-33331
Stored XSS in oRPC OpenAPI Docs Allows Arbitrary Script Execution
Publication date: 2026-03-24
Last updated on: 2026-03-26
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| orpc | orpc | to 1.13.9 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a stored cross-site scripting (XSS) issue in the OpenAPI documentation generation feature of the oRPC tool prior to version 1.13.9.
If an attacker can control any field within the OpenAPI specification, such as the info.description field, they can inject malicious code that breaks out of the JSON context.
When a user views the generated API documentation, this malicious JavaScript can be executed, potentially compromising the user's security.
This vulnerability has been fixed in version 1.13.9 of oRPC.
How can this vulnerability impact me? :
This vulnerability can allow an attacker to execute arbitrary JavaScript code in the context of the API documentation viewed by users.
Such execution can lead to theft of sensitive information, session hijacking, or other malicious actions against users who access the affected documentation.
Because the vulnerability is exploitable remotely without privileges and requires only user interaction, it poses a significant security risk.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, upgrade the orpc tool to version 1.13.9 or later, where the stored cross-site scripting (XSS) issue in the OpenAPI documentation generation has been patched.