CVE-2026-56876 extract-zip unvalidated symlink path traversal
Attackers can exploit unvalidated symlink targets in extract-zip to read or write arbitrary files outside the intended extraction directory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-56876?
CVE-2026-56876 is a high-severity path traversal vulnerability in max-mapper extract-zip, published on 26 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Which versions are affected by CVE-2026-56876?
2 open source packages ship an affected version, including extract-zip. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
extract-zip npm | All versions to 2.0.1 | None |
extract-zip npm | All versions to 2.0.1 | None |
Products include Max-Mapper Extract-Zip.
How do I fix CVE-2026-56876?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-56876 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56876 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-56876, GHSA-jmr9-qjv8-65gv, MINI-2m3p-wcr6-c54v, MINI-2v7g-v49f-f9gw, MINI-4xvw-qjq7-wvf8, MINI-7hw7-93rw-v4w3 and 13 more.