CVE-2026-27606

Critical

Description

Rollup is a module bundler for JavaScript. Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker to control output filenames (e.g., via CLI named inputs, manual chunk aliases, or malicious plugins) and use traversal sequences (`../`) to overwrite files anywhere on the host filesystem that the build process has permissions for. This can lead to persistent Remote Code Execution (RCE) by overwriting critical system or user configuration files. Versions 2.80.0, 3.30.0, and 4.59.0 contain a patch for the issue.

SeverityCritical

CVSS9.8

Exploit probability—

ProductRollup

PublishedFeb 25, 2026

First seenFeb 25, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

rollupjs rollup2.80.0, 3.30.0, 4.59.0 or later
rollup2.80.0, 3.30.0, 4.59.0 or later

Vendor advisories

Affected products

Product	Affected versions	Fixed in
rollupjs rollup	v < 2.80.0, 3.0.0 ≤ v < 3.30.0, 4.0.0 ≤ v < 4.59.0	2.80.0, 3.30.0, 4.59.0
rollupnpm	v < 2.80.0, 3.0.0 ≤ v < 3.30.0, 4.0.0 ≤ v < 4.59.0	2.80.0, 3.30.0, 4.59.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.