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Microsoft Security Response CenterCVE-2026-39956

jq: Missing runtime type checks for _strindices lead to crash and limited memory disclosure

MediumVendor CVSS 6.1 / 10 1 CVE Published Apr 17, 2026 at 1:02 AM UTC

Summary

Mariner

Products covered

  • cbl2 jq 1.6-5 on CBL Mariner 2.0

  • azl3 jq 1.7.1-4 on Azure Linux 3.0

  • cbl2 jq 1.6-5 on CBL-Mariner 2.0

Remediation

CBL-Mariner Releases Release Notes

Vendor-listed fixes

  • 1.6-6

  • 1.7.1-5

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • Added affected products: cbl2 jq 1.6-5 on CBL-Mariner 2.0.
    • The vendor changed its remediation guidance.

Updates

  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.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.