CVE-2022-25878Network attack vector

Object prototype modification via unsafe property paths

Published May 27, 2022 · Updated Sep 17, 2024

Prototype pollution in protobuf.js before 6.11.3 allows remote attackers to modify Object.prototype through untrusted property paths. The util.setProperty function recursively follows a proto path, while ReflectionObject.setParsedOption and .proto loading can feed such paths into that setter. Reachability requires an application to pass untrusted input to these APIs or load untrusted schema files; successful exploitation changes inherited properties across objects in that process.

CVSS severity7.5
High
EPSS probability2.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in protobuf.js before 6.11.3 allows remote attackers to modify Object.prototype through untrusted property paths. The util.setProperty function recursively follows a proto path, while ReflectionObject.setParsedOption and .proto loading can feed such paths into that setter. Reachability requires an application to pass untrusted input to these APIs or load untrusted schema files; successful exploitation changes inherited properties across objects in that process.

The record

CVE
CVE-2022-25878
Published
May 27, 2022
Updated
Sep 17, 2024
Vendor
protobufjs
Product
protobuf.js
Classifications
CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <6.11.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

protobufjs · protobuf.jsversion=unspecified <6.11.3

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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