CVE-2026-19589

Packer vulnerable to arbitrary file write via crafted plugin archive during installation

7.1 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: High
Availability: None

Exploit likelihood

0.19%Up 0.1 points since Aug 18, 2026

What each source reports

CVE List Score used 7.1

Packer vulnerable to arbitrary file write via crafted plugin archive during installation

Record: CVE-2026-19589
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

EUVDEUVD-2026-60378 7.1

Record: EUVD-2026-60378
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-3cf4-f9v4-j353 7.1

Packer up to 1.15.4 is vulnerable to an issue in the third-party plugin installer that may allow...

Record: GHSA-3cf4-f9v4-j353
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

NVD 7.1

Record: CVE-2026-19589
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

OSV 7.1

Packer vulnerable to arbitrary file write via crafted plugin archive during installation

Record: CVE-2026-19589
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

OSVAZL-96603 No score

CVE-2026-19589 affecting package packer for versions less than 1.9.5-20

Record: AZL-96603
Updated: 2026-11-05

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`packer` Azure Linux:3	before 1.9.5-20	1.9.5-20

History

History
Recorded	Changed	Sources
Nov 5, 2026	facts	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-19589 is a high vulnerability (CVSS 7.1) in Hashicorp Packer, published August 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 9th percentile. Fixed in packer 1.9.5-20.