XSS in Middleapi Orpc
CVE-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 (XSS) vulnerability exists in the OpenAPI documentation generation of orpc. If an a…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.000 (5.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
Affected products
- Middleapi Orpc — versions < 1.13.9
- Orpc
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33331?
- CVE-2026-33331 is a high-severity vulnerability in Middleapi Orpc, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-03-24.
- How severe is CVE-2026-33331?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2026-33331 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.