CVE-2026-28794
published 2026-03-06CVE-2026-28794: 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…
PriorityP269critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.91%
55.5th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| middleapi | orpc | < 1.13.6 | 1.13.6 |
| orpc | client | >= 0 < 1.13.6 | 1.13.6 |
| orpc | orpc | < 1.13.6 | 1.13.6 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.09.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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GHSA
`@orpc/client` has Prototype Pollution via `StandardRPCJsonSerializer` Deserialization
ghsa·2026-03-02
CVE-2026-28794 [CRITICAL] CWE-1321 `@orpc/client` has Prototype Pollution via `StandardRPCJsonSerializer` Deserialization
`@orpc/client` has Prototype Pollution via `StandardRPCJsonSerializer` Deserialization
### Summary
A critical 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.
### Vulnerability Details
The root cause lies in the `deserialize()` method of `StandardRPCJsonSerializer`. When processing attacker-controlled path segments from the `meta` and `maps` arrays, the deserializer fails to implement val
OSV
`@orpc/client` has Prototype Pollution via `StandardRPCJsonSerializer` Deserialization
osv·2026-03-02
CVE-2026-28794 [CRITICAL] `@orpc/client` has Prototype Pollution via `StandardRPCJsonSerializer` Deserialization
`@orpc/client` has Prototype Pollution via `StandardRPCJsonSerializer` Deserialization
### Summary
A critical 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.
### Vulnerability Details
The root cause lies in the `deserialize()` method of `StandardRPCJsonSerializer`. When processing attacker-controlled path segments from the `meta` and `maps` arrays, the deserializer fails to implement val
No detection rules found.
No public exploits indexed.
2026-03-06
Published