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Vulnerability record · CVE-2026-27606 · published 25 February 2026

CVE-2026-27606: Rollupjs rollup path traversal vulnerability

Rollupjs · Rollup

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.

8.8 CVSS 4.0 High EPSS 1.5% · top 26.0% CWE-22 · Path traversal
8.8CVSS 4.0 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
20References, 1 tagged exploit
10 Sep 2026Last modified by NVD

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.

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/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2 Patch
https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e Patch
https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3 Patch
https://github.com/rollup/rollup/releases/tag/v2.80.0 Product
https://github.com/rollup/rollup/releases/tag/v3.30.0 Product
https://github.com/rollup/rollup/releases/tag/v4.59.0 Product
https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc ExploitVendor Advisory
https://access.redhat.com/errata/RHSA-2026:10175
https://access.redhat.com/errata/RHSA-2026:13508
https://access.redhat.com/errata/RHSA-2026:13512
https://access.redhat.com/errata/RHSA-2026:13545
https://access.redhat.com/errata/RHSA-2026:5132
https://access.redhat.com/errata/RHSA-2026:5649
https://access.redhat.com/errata/RHSA-2026:5665
https://access.redhat.com/errata/RHSA-2026:6174
https://access.redhat.com/errata/RHSA-2026:6802
https://access.redhat.com/errata/RHSA-2026:8483
https://access.redhat.com/security/cve/CVE-2026-27606
https://bugzilla.redhat.com/show_bug.cgi?id=2442530
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27606.json

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-27606), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.