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CVE-2026-44292

protobufjs: Prototype injection in generated message constructors

Published: May 13, 2026Updated: May 13, 2026 Sources: CVE List NVDCWE-1321
5.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 81.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated message constructors copied enumerable properties from a provided properties object without filtering the __proto__ key. If an application constructed a message from an attacker-controlled plain object, an own enumerable __proto__ property could alter the prototype of that individual message instance. This vulnerability is fixed in 7.5.6 and 8.0.2.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-1321

Affected Products

protobufjs
oss-projectaka protobuf.js
protobuf.jsLibrary
OSS Libraries / generic-library
protobufjs project
oss-projectaka protobufjs, protobufjs-cli
protobufjsLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-fx83-v9x8-x52w
github.com
News mentions
1

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