Packer <=1.15.4 Plugin Installer FS Modification CVE-2026-19589
CVE-2026-19589 Published on August 17, 2026
Packer vulnerable to arbitrary file write via crafted plugin archive during installation
Packer up to 1.15.4 is vulnerable to an issue in the third-party plugin installer that may allow unintended file system modification and could lead to code execution. A user who installs a plugin from a malicious or compromised source may be affected. This vulnerability (CVE-2026-19589) is fixed in Packer 1.16.0.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-19589 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-19589
Want to know whenever a new CVE is published for HashiCorp Packer? stack.watch will email you.
Affected Versions
HashiCorp Packer:- Version 1.7.0 and below 1.16.0 is affected.