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.
History

Thu, 26 Feb 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 26 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 25 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Rollupjs
Rollupjs rollup
CPEs cpe:2.3:a:rollupjs:rollup:*:*:*:*:*:node.js:*:*
Vendors & Products Rollupjs
Rollupjs rollup
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Wed, 25 Feb 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Rollup
Rollup rollup
Vendors & Products Rollup
Rollup rollup

Wed, 25 Feb 2026 03:15:00 +0000

Type Values Removed Values Added
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.
Title Rollup 4 has Arbitrary File Write via Path Traversal
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-25T02:08:06.682Z

Updated: 2026-02-25T20:10:29.816Z

Reserved: 2026-02-20T19:43:14.602Z

Link: CVE-2026-27606

cve-icon Vulnrichment

Updated: 2026-02-25T20:10:18.661Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-25T03:16:04.603

Modified: 2026-02-25T16:05:11.063

Link: CVE-2026-27606

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-25T02:08:06Z

Links: CVE-2026-27606 - Bugzilla