CVE-2026-33331: oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards

Q: How do I fix CVE-2026-33331?

orpc: upgrade to 1.13.9. Exact commands for each OS are on this page.

Q: Is CVE-2026-33331 being exploited?

CVE-2026-33331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33331 affect?

CVE-2026-33331 affects orpc. Severity is high (CVSS 8.2). 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 at

Q: How urgent is CVE-2026-33331?

Priority 39/100. High severity; Public exploit reference

Routine

HIGH 8.2UPGRADE

CVE-2026-33331 is a high-severity flaw (CVSS 8.2) affecting orpc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 documentatio

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: orpc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 20:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

orpc orpc UPGRADE

Affected: < 1.13.9

Fixed in: 1.13.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy orpc || rpm -q orpc || orpc --version

2. UPGRADE to 1.13.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade orpc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade orpc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33331?

orpc: upgrade to 1.13.9. Exact commands for each OS are on this page.

Is CVE-2026-33331 being exploited?

CVE-2026-33331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33331 affect?

CVE-2026-33331 affects orpc. Severity is high (CVSS 8.2). 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 at

How urgent is CVE-2026-33331?

Priority 39/100. High severity; Public exploit reference

Related CVEs

CVE-2026-28794 CRITICAL 9.8 UPGRADE oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards

References

← Back to latest CVEs