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CVE-2026-19589

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

HIGH
7.1
CVSS Score
Published: August 17, 2026 at 08:22 PM UTC
Updated: October 23, 2026 at 04:10 PM UTC
1 product affected across 1 vendorPacker

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Severity
HIGH7.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Packer· Hashicorp
90%
1.7.0 ≤ v < 1.16.01.7.0
Affected range stops below 1.16.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via-crafted-plugin-archive-during-installation/77654

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHHashiCorp
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-22

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