PT-2026-35054 · Zserio · Zserio

Ryujiyasu · Published 2026-04-24 · Updated 2026-04-28 · CVE-2026-33524

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Zserio versions prior to 2.18.1

Description Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. A crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, leading to an Out of Memory (OOM) error and causing a Denial of Service by crashing the process.

Recommendations Update to version 2.18.1.

Fix

DoS

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-33524

GHSA-CWQ5-8PVQ-J65J

Affected Products

Zserio

References · 10

• https://github.com/ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65j · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-cwq5-8pvq-j65j · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33524 · Security Note
• https://github.com/ndsev/zserio/commit/a9932de4b5eefb3afd5e18ca2fd758aa744a7c69 · Note
• https://github.com/ndsev/zserio · Note
• https://twitter.com/dailycve/status/2047768680939897190 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2047910530459820092 · Twitter Post
• https://twitter.com/CVEnew/status/2047798582158447000 · Twitter Post
• https://twitter.com/dailycve/status/2047769721974436142 · Twitter Post
• https://twitter.com/_cvereports/status/2049063748409724981 · Twitter Post