zchunk vulnerabilities

Products

• zchunk 2

Latest zchunk CVEs

Newest publication first

1. CVE-2026-117556 zchunk before 1.5.5 Heap Out-of-Bounds Read via read_preface()

   Published 2026-10-27

   Medium·CVSS 5.3 EPSS 0.33%

   zchunk before 1.5.5 contains a heap out-of-bounds read vulnerability in read_preface() in src/lib/header.c that passes the total header length instead of remaining bytes to compint parsing functions. Attackers can supply a crafted .zck file whose header ends inside a compressed i...

2. CVE-2023-46228 zchunk before 1.3.2 has multiple integer overflows via malformed zchunk files to lib/comp/comp.c, lib/comp/zstd/zstd.c, lib/dl/multipart.c, or lib/header.c.

   Published 2023-10-19

   High·CVSS 7.8 EPSS 0.28%

   zchunk before 1.3.2 has multiple integer overflows via malformed zchunk files to lib/comp/comp.c, lib/comp/zstd/zstd.c, lib/dl/multipart.c, or lib/header.c.

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.