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CVE-2026-28794

Orpc remote code execution

9.8 CRITICALPublic exploitEPSS 1.25%
  1. Published6 Mar 2026

Description

oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to version 1.13.6, 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 can lead to severe security breaches, including authentication bypass, denial of service, and potentially Remote Code Execution. This issue has been patched in version 1.13.6.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Orpc< 1.13.6

Remediation

Fixed in
Orpc≥ 1.13.6

References

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Frequently asked

Is CVE-2026-28794 being actively exploited?

CVE-2026-28794 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.25%.

How severe is CVE-2026-28794?

CVE-2026-28794 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.25% probability of exploitation.

Which products are affected by CVE-2026-28794?

Affected products include Orpc.

How do I fix CVE-2026-28794?

Upgrade affected software to a fixed version, for example Orpc 1.13.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28794 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.