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CVE-2026-76845

adm-zip: adm-zip: Arbitrary File Overwrite via Symlink Following

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · August 24, 2026

Updated · October 27, 2026

Description

A flaw was found in adm-zip, a Node.js library used for handling zip archives. This vulnerability allows a local attacker to overwrite arbitrary files on the system. When extracting an archive, adm-zip follows symbolic links, which are special files that point to other files or directories. An attacker can exploit this by placing a symbolic link within a temporary extraction directory, redirecting the extraction process to write data outside the intended secure location. This could lead to unauthorized modification of system files.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CWE-59 · Improper Link Resolution Before File Access ('Link Following')