CVE-2026-27606

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.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27606.json

https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc

https://github.com/rollup/rollup/releases/tag/v4.59.0

https://github.com/rollup/rollup/releases/tag/v3.30.0

https://github.com/rollup/rollup/releases/tag/v2.80.0

https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3

https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e

https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2

https://bugzilla.redhat.com/show_bug.cgi?id=2442530

https://access.redhat.com/security/cve/CVE-2026-27606

https://access.redhat.com/errata/RHSA-2026:8483

https://access.redhat.com/errata/RHSA-2026:6802

https://access.redhat.com/errata/RHSA-2026:6174

https://access.redhat.com/errata/RHSA-2026:5665

https://access.redhat.com/errata/RHSA-2026:5649

https://access.redhat.com/errata/RHSA-2026:5132

https://access.redhat.com/errata/RHSA-2026:13545

https://access.redhat.com/errata/RHSA-2026:13512

https://access.redhat.com/errata/RHSA-2026:13508

https://access.redhat.com/errata/RHSA-2026:10175

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS