CVE-2026-33524

HighCVSS 7.5/10Last modified Oct 26, 2026

Description

Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-789

Affected software

Vendor	Product	Versions
ndsev	zserio	< 2.18.1

References

https://github.com/ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65jExploit, Mitigation, Vendor Advisory

Timeline

Published: Apr 24, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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