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CVE-2026-33331

21
FAUCET Score

CVE-2026-33331 describes a stored cross-site scripting (XSS) vulnerability in oRPC versions prior to 1.13.9, affecting its OpenAPI documentation generation. An attacker can inject arbitrary JavaScript into the documentation by controlling OpenAPI specification fields, which then executes when a user views the generated API documentation. This vulnerability is rated Medium with a CVSS score of 6.1, requiring user interaction for exploitation and having a low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.13.9CPE matchmatch criteria
cpe:2.3:a:orpc:orpc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 21st percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @orpc/openapiFixed in: 1.13.9

Vendor Advisories (1)

npmGHSA-7f6v-3gx7-27q8high

oRPC has Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify

Mar 20, 2026

References

github.com / middleapi/orpc/commit/4f0efa8a1d3fa8e8317a4b03cc3945a5dfd68add
Patch
github.com / middleapi/orpc/releases/tag/v1.13.9
ProductRelease Notes
github.com / middleapi/orpc/security/advisories/GHSA-7f6v-3gx7-27q8
ExploitMitigationVendor Advisory