HIGH 7.5 Microsoft

CVE-2026-23490

pyasn1 has a DoS vulnerability in decoder

Microsoft Security Update 2026-Jan: pyasn1 has a DoS vulnerability in decoder

Affected Products

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

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23490
https://nvd.nist.gov/vuln/detail/CVE-2026-23490

Published: 2026-01-13 · Source: Microsoft · Feed updated: 2026-08-10

This high severity vulnerability with a CVSS score of 7.5 was published on 2026-01-13 via Microsoft. Affected: azl3 python-pyasn1 0.4.8-1 on Azure Linux 3.0, cbl2 python-pyasn1 0.4.8-1 on CBL Mariner 2.0.

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