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Microsoft Security Response CenterCVE-2026-6409

Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input

Mariner

Read the vendor bulletin Get alerts for azl3 mysql 8.0.45-2 on Azure Linux
HighCVSS not listedHigh severity
Scope

What the vendor says is affected

  • azl3 mysql 8.0.45-2 on Azure Linux 3.0
  • cbl2 protobuf 3.17.3-5 on CBL Mariner 2.0
  • azl3 pytorch 2.2.2-12 on Azure Linux 3.0
  • azl3 protobuf 25.3-6 on Azure Linux 3.0

Versions the vendor lists as fixed

  • 25.3-7
Next step

What the vendor recommends

CBL-Mariner Releases

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-6409View CVSS, KEV, EPSS, and threat context
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