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

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-28794 is a critical-severity flaw (CVSS 9.8) 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 1.13.6, a prototype pollution vulnerability exists in the RPC JSON deserializer of the @orpc/client package. The vulnerability allows unauthenticated, remote attackers to inject arbitrary properties into the global Object.prototype. Because this pollution persists for the lifetime of the Node.js process and affects all objects, it

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-1321
Published	2026-03-06
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

2026-03-06 05:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

orpc orpc UPGRADE

Affected: < 1.13.6

Fixed in: 1.13.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.13.6 (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.

Exact fixes by distribution

npm · @orpc/client · FIXED · 1.13.6 · vulnerable: <= 1.13.5 · source

npm install @orpc/client@">=1.13.6" npm ls @orpc/client

Fedora 46 · python-hatchling · FIXED · 1.33.0-1.fc46 · FEDORA-2026-3ccbf17812 · source

sudo dnf upgrade --advisory=FEDORA-2026-3ccbf17812

Fedora ELN · pie · FIXED · 1.5.3-1.eln159 · FEDORA-2026-e009523caa · source

sudo dnf upgrade --advisory=FEDORA-2026-e009523caa

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/middleapi/orpc/security/advisories/GHSA-m272-9rp6-32mc

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-2026-28794?

orpc: upgrade to 1.13.6. Exact commands for each OS are on this page.

Is CVE-2026-28794 being exploited?

CVE-2026-28794 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-2026-28794 affect?

CVE-2026-28794 affects orpc. Severity is critical (CVSS 9.8). oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to version 1.13.6, a prototype pollution vulnerability exists in the RPC JSON deserializer of the @orpc/client package. The vulnerabi

How urgent is CVE-2026-28794?

Priority 63/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2026-33331 HIGH 8.2 UPGRADE oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards

References

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