Vulnerability details

CVE-2026-56876

max-mapper extract-zip

extract-zip unvalidated symlink path traversal

CVSS 4.0

8.6High

Official description

extract-zip does not validate symlink targets when extracting zip archives. When processing a malicious zip file containing a symlink with a relative path like '../../../../etc/passwd', extract-zip will extract the symlink without validation, allowing it to point outside the extraction directory. Depending on how extract-zip is used, an attacker could read or write to arbitrary files.

CVSS scores

Score	Version	Source	Vector
8.6High	4.0	CVEProject cvelistV5 (CNA) (cisa-cg)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`
8.1High	3.1	CVEProject cvelistV5 (CNA) (cisa-cg)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
max-mapper	extract-zip	All	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/ziad626/extract-zip-security-research/security/advisories/GHSA-x7jf-2287-qcpf third-party-advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-177-01.json third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2026-56876 vdb-entry

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Details

Published: 2026-06-26
Last updated: 2026-06-30
State: Published
Assigner (CNA): cisa-cg

Exploit prediction (EPSS)

0.52%

Probability of exploitation in 30 days

44.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-61
UNIX Symbolic Link (Symlink) Following