CVE-2026-27606 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-27606HIGH

Rollup 4 has Arbitrary File Write via Path Traversal

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   N    8.8   .0140   70.4     —

AFFECTED
  Product  Versions    Fixed
  rollup   < 2.80.0 –  —

TIMELINE
  Feb 20  Reserved by GitHub_M
  Feb 25  Published (CNA: GitHub_M)
  Aug 17  EXPLOIT PUBLISHED — CVE-2026-27606 (rollup). Public exploit reference added.

CWE-22 · CNA: GitHub_M · CVSS v4.0 · 20 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
February 20, 2026	Reserved	Reserved by GitHub_M
February 25, 2026	Published	Published (CNA: GitHub_M)
August 17, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-27606 (rollup). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
rollup	rollup	—	< 2.80.0	—

Weaknesses

CWE-22

References (20)

https://access.redhat.com/errata/RHSA-2026:10175 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:13508 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:13512 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:13545 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:5132 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:5649 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:5665 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:6174 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:6802 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:8483 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/security/cve/CVE-2026-27606 [vdb-entry, x_refsource_REDHAT]
https://bugzilla.redhat.com/show_bug.cgi?id=2442530 [issue-tracking, x_refsource_REDHAT]
https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2 [x_refsource_MISC]
https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e [x_refsource_MISC]
https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3 [x_refsource_MISC]
https://github.com/rollup/rollup/releases/tag/v2.80.0 [x_refsource_MISC]
https://github.com/rollup/rollup/releases/tag/v3.30.0 [x_refsource_MISC]
https://github.com/rollup/rollup/releases/tag/v4.59.0 [x_refsource_MISC]
https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc [x_refsource_CONFIRM]
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27606.json [x_sadp-csaf-vex]

Authoritative record: CVE-2026-27606 at cve.org

Vendors: rollup

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-27606 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.