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Medium 6.5Published Apr 15, 2026

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

Updated under an hour ago ()

Does this affect you?

It affects Mafintosh Protocol-buffers-schema parser. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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.

CVSS
6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness (CWE)
CWE-200
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
certcc
NVD analysis
Awaiting Analysis
Record last updated
Apr 15, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
Mafintosh Protocol-buffers-schema parser
mafintosh:protocol_buffers_schema_parser (from the name)
from 3.6.0 before 3.6.1
CNA record

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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