CVE-2026-33331
published 2026-03-24CVE-2026-33331: 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…
PriorityP428medium5.4CVSS 3.1
AVNACLPRLUIRSCCLILAN
EPSS
0.29%
20.4th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| middleapi | orpc | < 1.13.9 | 1.13.9 |
| orpc | openapi | >= 0 < 1.13.9 | 1.13.9 |
| orpc | orpc | < 1.13.9 | 1.13.9 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
osv·2026-03-20
CVE-2026-33331 [HIGH] oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
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.
In the packages/openapi/src/plugins/openapi-reference.ts file, the renderDocsHtml() function takes an OpenAPI spec object and embeds it directly into the HTML response using a template literal:
`${JSON.stringify(spec)}`
The JSON.stringify() function does not escape HTML characters like . Therefore, if an attacker provides a string containing ..., the browser will prematurely close the appli
GHSA
oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
ghsa·2026-03-20
CVE-2026-33331 [HIGH] CWE-79 oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
A Stored Cross-Site Scripting (XSS) vulnerability exists in the OpenAPI documentation generation of orpc. If an attacker can control any field within the OpenAPI specification (such as info.description), they can break out of the JSON context and execute arbitrary JavaScript when a user views the generated API documentation.
In the packages/openapi/src/plugins/openapi-reference.ts file, the renderDocsHtml() function takes an OpenAPI spec object and embeds it directly into the HTML response using a template literal:
`${JSON.stringify(spec)}`
The JSON.stringify() function does not escape HTML characters like . Therefore, if an attacker provides a string containing ..., the browser will prematurely close the appli
No detection rules found.
No public exploits indexed.
2026-03-24
Published