CVE-2026-56876
extract-zip unvalidated symlink path traversal
HIGH 8.6EPSS 0.5%
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.
- Affected
- max-mapper · extract-zip
- CVSS v4.0 CNA
- 8.6 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v4.0 GitHub
- 8.6 HIGH
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 - CVSS v3.1 CNA
- 8.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - EPSS
- 0.53% chance of exploitation in the next 30 days, 43rd percentile
- Published
- 2026-06-26
- Updated
- 2026-06-30
Proof-of-concept exploits (1)
- ziad626/CVE-2026-56876-POC1★ · 2026-07-09
Security advisories
- ziad626/extract-zip-security-research/security/advisories/GHSA-x7jf-2287-qcpf
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-177…
- https://www.cve.org/CVERecord?id=CVE-2026-56876
- advisories/GHSA-jmr9-qjv8-65gv