CVE-2026-27606Rollup is a module bundler for JavaScript.
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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
- 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rollupjs rollup rollupjs:rollup | before 2.80.0; from 3.0.0 before 3.30.0; from 4.0.0 before 4.59.0 | NVD |
References
- https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2patch
- https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44epatch
- https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3patch
- https://github.com/rollup/rollup/releases/tag/v2.80.0product
- https://github.com/rollup/rollup/releases/tag/v3.30.0product
- https://github.com/rollup/rollup/releases/tag/v4.59.0product
- https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgcexploit, vendor-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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.