CVE-2026-33331oRPC: Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
Updated under an hour ago ()
Does this affect you?
It affects middleapi orpc and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
middleapi orpc middleapi:orpc (from the name) | before 1.13.9 | CNA record |
orpc orpc orpc:orpc | before 1.13.9 | NVD |
References
- https://github.com/middleapi/orpc/security/advisories/GHSA-7f6v-3gx7-27q8x-refsource-confirm, exploit, mitigation, vendor-advisory
- https://github.com/middleapi/orpc/commit/4f0efa8a1d3fa8e8317a4b03cc3945a5dfd68addx-refsource-misc, patch
- https://github.com/middleapi/orpc/releases/tag/v1.13.9x-refsource-misc, product, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.