CVE-2026-27606

critical

Rollup is a module bundler for JavaScript.

Vendor / product: 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.

CVSS

9.8

9.8 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-02-25 03:16

Modified: 2026-09-10 13:18

NVD status: Modified

Last synced 3 days ago

Verified against the source API 2026-10-27 07:07 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

rollupjs / rollup <2.80.0, ≥3.0.0 <3.30.0, ≥4.0.0 <4.59.0

Weakness classification (CWE)

CWE-22

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

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

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

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

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

References

https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2 security-advisories@github.com
https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e security-advisories@github.com
https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3 security-advisories@github.com
https://github.com/rollup/rollup/releases/tag/v2.80.0 security-advisories@github.com
https://github.com/rollup/rollup/releases/tag/v3.30.0 security-advisories@github.com
https://github.com/rollup/rollup/releases/tag/v4.59.0 security-advisories@github.com
https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc security-advisories@github.com
https://access.redhat.com/errata/RHSA-2026:10175 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13508 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13512 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13545 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:5132 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:5649 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:5665 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:6174 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:6802 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:8483 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/security/cve/CVE-2026-27606 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://bugzilla.redhat.com/show_bug.cgi?id=2442530 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27606.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗

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