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Microsoft Security Response CenterCVE-2025-43853

iwasm vulnerable to filesystem sandbox escape with symlink when using uvwasi feature

HighVendor CVSS 5.5 / 10 1 CVE Published Aug 12, 2026 at 10:34 PM UTC

Summary

Mariner

Products covered

  • cbl2 fluent-bit 3.0.6-2

  • azl3 fluent-bit 3.1.9-4 on Azure Linux 3.0

  • cbl2 fluent-bit 3.0.6-2 on CBL-Mariner 2.0

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.