CVE-2026-30922: pyasn1 Vulnerable to Denial of Service via Unbounded Recursion

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P

Exploit Status

Not Exploited

Patch Tuesday

2026-Mar

Released

2026-03-21

Last Updated

2026-03-31

EPSS Score

0.03% (percentile: 7.2%)

Affected Products (3)

Open Source Software

• azl3 python-pyasn1 0.4.8-1 on Azure Linux 3.0
• cbl2 python-pyasn1 0.4.8-1 on CBL Mariner 2.0
• azl3 python-pyasn1 0.4.8-2 on Azure Linux 3.0

Revision History

• 2026-03-21: Information published.
• 2026-03-27: Information published.
• 2026-03-28: Information published.
• 2026-03-31: Information published.