PT-2026-33111 · Npm · Protocol-Buffers-Schema

Published 2026-04-15 · Updated 2026-04-16 · CVE-2026-5758

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Name of the Vulnerable Software and Affected Versions protocol-buffers-schema version 3.6.0

Description JavaScript is subject to prototype pollution, a condition where an attacker can manipulate the prototype of an object to alter application logic, bypass security checks, cause a denial of service, or achieve remote code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2026-5758

GHSA-J452-XHG8-QG39

Affected Products

Protocol-Buffers-Schema

References · 6

• https://osv.dev/vulnerability/GHSA-j452-xhg8-qg39 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5758 · Security Note
• https://github.com/mafintosh/protocol-buffers-schema · Note
• https://github.com/mafintosh/protocol-buffers-schema/pull/70 · Note
• https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution · Note
• https://twitter.com/CVEnew/status/2044737948977910167 · Twitter Post