CVE-2026-33331

Name: CVE-2026-33331
Creator: NVD / NIST
Published: 2026-03-24T20:16:28.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2026-33331 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.29%

20.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Orpc	Orpc	< 1.13.9

References

https://github.com/middleapi/orpc/commit/4f0efa8a1d3fa8e8317a4b03cc3945a5dfd68addPatch
https://github.com/middleapi/orpc/releases/tag/v1.13.9Product, Release Notes
https://github.com/middleapi/orpc/security/advisories/GHSA-7f6v-3gx7-27q8Exploit, Mitigation, Vendor Advisory
https://github.com/middleapi/orpc/security/advisories/GHSA-7f6v-3gx7-27q8Exploit, Mitigation, Vendor Advisory

Timeline

Published: Mar 24, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33331?

How severe is CVE-2026-33331?

CVE-2026-33331 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33331?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33331?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST