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Microsoft Security Response CenterCVE-2026-33936

python-ecdsa: Denial of Service via improper DER length validation in crafted private keys

Mariner

Read the vendor bulletin Get alerts for cbl2 python-ecdsa 0.17.0-1 on CBL-Mariner
5.3CVSS out of 10Medium severity
Scope

What the vendor says is affected

  • cbl2 python-ecdsa 0.17.0-1 on CBL-Mariner 2.0
  • azl3 python-ecdsa 0.18.0-2 on Azure Linux 3.0
  • cbl2 python-ecdsa 0.17.0-1 on CBL Mariner 2.0

Versions the vendor lists as fixed

  • 0.19.2-1
Next step

What the vendor recommends

Release Notes 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.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-33936View CVSS, KEV, EPSS, and threat context
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