CVE-2026-33331
oRPC: Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
MEDIUM 5.4EPSS 0.3%
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
- middleapi · orpc
- CVSS v3.1 NVD
- 5.4 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS v3.1 GITHUB
- 8.2 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N - EPSS
- 0.34% chance of exploitation in the next 30 days, 26th percentile
- Published
- 2026-03-24
- Updated
- 2026-03-25
Proof-of-concept exploits (1)
Security advisories
- middleapi/orpc/security/advisories/GHSA-7f6v-3gx7-27q8
- middleapi/orpc/commit/4f0efa8a1d3fa8e8317a4b03cc3945a5dfd68add