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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.

PUBLISHED Reserved 2026-03-20 | Published 2026-04-24 | Updated 2026-04-27 | Assigner GitHub_M




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

Problem types

CWE-789: Memory Allocation with Excessive Size Value

Product status

< 2.18.1
affected

References

github.com/...zserio/security/advisories/GHSA-cwq5-8pvq-j65j

cve.org (CVE-2026-33524)

nvd.nist.gov (CVE-2026-33524)

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