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

Mariner

Read the vendor bulletin Get alerts for azl3 packer 1.9.5-18 on Azure Linux

7.1CVSS out of 10High severity

Scope

What the vendor says is affected

azl3 packer 1.9.5-18 on Azure Linux 3.0

Timeline

When this advisory changed

Aug 20, 2026 at 9:59 PM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Aug 21, 2026 at 7:10 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Sep 6, 2026 at 6:25 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-19589View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-19589
Last source check: Sep 13, 2026 at 2:40 AM UTC

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Your environment

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Test the update or mitigation through your normal change process.

Watch azl3 packer 1.9.5-18 on Azure Linux

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What the vendor says is affected

When this advisory changed

CVEs named in this advisory

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