Vulnerability in Cthackers Adm-Zip
CVE-2026-114104
adm-zip before 0.6.1 contains an inconsistent entry resolution vulnerability that allows attackers to bypass content validation by supplying ZIP archives with duplicate entry names. Attackers can craft archives where getEntry() returns the last duplicate while extractAllTo() writes the first, causing unvalidated bytes to be written to disk.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/cthackers/adm-zip/security/advisories/GHSA-p634-w6r4-rjp2 (vendor-advisory)
- www.vulncheck.com/advisories/adm-zip-before-0.6.1-duplicate-zip-entry-name-vali… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114104?
- CVE-2026-114104 is a medium-severity vulnerability in Cthackers Adm-Zip, classified under CWE-436. CVSS score: 5.9/10. Published 2026-10-21.
- How severe is CVE-2026-114104?
- Medium severity. CVSS v3 base score is 5.9 out of 10.