High severity7.5NVD Advisory· Published Apr 24, 2026· Updated Apr 28, 2026
CVE-2026-33666
CVE-2026-33666
Description
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.
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Affected products
1Patches
Vulnerability mechanics
References
1- github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwjnvdExploitMitigationVendor Advisory
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