CVE-2026-5758: Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution

April 15, 2026 (updated April 16, 2026)

JavaScript is vulnerable to prototype pollution in Mafintosh’s protocol-buffers-schema Version 3.6.0, where an attacker may alter the application logic, bypass security checks, cause a DoS or achieve remote code execution.

References

github.com/advisories/GHSA-j452-xhg8-qg39
github.com/mafintosh/protocol-buffers-schema
github.com/mafintosh/protocol-buffers-schema/pull/70
morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution
nvd.nist.gov/vuln/detail/CVE-2026-5758

Code Behaviors & Features

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