CVE•Published 2026-10-27•Modified 2026-10-28•0 articles on news•4 live references•NVD data
CVE-2026-117556
Vulnerability data via NVD (ingested)
CVSS v3.1
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS percentile
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Weaknesses (CWE)
Description
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.
Timeline
Published 2026-10-27
Modified 2026-10-28
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-117556Hosts Shodan has explicitly fingerprinted as vulnerable.
More intel sources (5)
Shodan report
vuln:CVE-2026-117556Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-117556Censys host search filtered to this CVE id.
grep.app
CVE-2026-117556Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-117556GitHub code search for direct mentions.
Google dork
"CVE-2026-117556" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-117556 on GitHub.
We haven't classified any articles referencing CVE-2026-117556 yet. The external references above still apply.