CVE-2026-33666
High · 7.5CVSS
7.5
EPSS
0.5%
Published
Apr 24, 2026
CISA due date
—
The record
Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, in BitStreamReader.h readBytes() / readString(), the setBitPosition() bounds check receives the overflowed value and is completely bypassed. The code then reads len bytes (512 MB) from a buffer that is only a few bytes long, causing a segmentation fault. This vulnerability is fixed in 2.18.1.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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