CVE-2026-19589CWE-22path-traversal

CVE-2026-19589

High · published August 18, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
8.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00194 · 8.6th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-08-18T01:16Z
References (1)
https://discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via-crafted-plugin-archive-during-installation/77654 · [email protected]
EPSS history
Timeline
  • 17 AUG 20:22Z
    Packer vulnerable to arbitrary file write via crafted plugin archive during installation
    cvelistv5