MEDIUMCVSS v3.1 4.3Vulnerability
CVE-2026-117556
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 integer, causing reads past the heap header buffer and crashing the application.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-27T15:29:09.616245+00:00
- Cvss severity
- MEDIUM
- Cvss score
- 4.3
- Retrieved at
- 2026-10-27T15:31:26+00:00
- Score
- 4.3
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-117556
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- First seen by Signal
- 2026-10-27T15:31:26+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- Published at
- 2026-10-27T14:16:36.340
- Last modified
- 2026-10-27T14:16:36.340
Related Entities (1)
HAS_WEAKNESS (1)
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