CVE-2026-27606

HIGH EPSS 64.2%
Published Feb 25, 20264mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 4.0
High
Find Similar
Published Feb 25, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
8.8
Exploitability
—
Impact
—
Vector string
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:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
64.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 3

VendorProductVersionRange
rollupjsrollup* <2.80.0
rollupjsrollup*≥3.0.0  –  <3.30.0
rollupjsrollup*≥4.0.0  –  <4.59.0

References 7

  • github.com https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2
    Patch
  • github.com https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e
    Patch
  • github.com https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3
    Patch
  • github.com https://github.com/rollup/rollup/releases/tag/v2.80.0
    Product
  • github.com https://github.com/rollup/rollup/releases/tag/v3.30.0
    Product
  • github.com https://github.com/rollup/rollup/releases/tag/v4.59.0
    Product
  • github.com https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2
    Patch
  • github.com https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e
    Patch
  • github.com https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3
    Patch