PT-2026-37209 · Go · Github.Com/Woven-Planet/Go-Zserio

Published 2026-04-24 · Updated 2026-04-24

OSV

CVSS v3.1

9.8

Critical

Base vector

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

Impact

When deserializing arrays, strings or bytes (blob) types zserio first reads the size of the variable, and then allocates sufficient memory to load data. Since the size is always trusted this can be abused by creating a data file with a large size value, causing the zserio runtime to allocate large amounts of memory.

Patches

Please apply this commit.

Workarounds

• Do not accept zserio data from non-trusted sources.
• Use secure transportation protocols (like TLS).

Fix

Weakness Enumeration

CWE-789

Related Identifiers

GHSA-XHJ4-G6W8-2XJW

Affected Products

Github.Com/Woven-Planet/Go-Zserio

References · 4

• https://osv.dev/vulnerability/GHSA-xhj4-g6w8-2xjw · Vendor Advisory
• https://github.com/woven-by-toyota/go-zserio/security/advisories/GHSA-xhj4-g6w8-2xjw · Note
• https://github.com/woven-by-toyota/go-zserio · Note
• https://github.com/woven-by-toyota/go-zserio/commit/39ef1decde7e9766207794d396018776b33c6e45 · Note