HIGH 7.5 Microsoft
CVE-2026-59884
pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs
Microsoft Security Update 2026-Jul: pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs
Affected Products
- azl3 python-pyasn1 0.4.8-2 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59884
- https://nvd.nist.gov/vuln/detail/CVE-2026-59884
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-07-14 via Microsoft. Affected: azl3 python-pyasn1 0.4.8-2 on Azure Linux 3.0.
vulnfeed aggregates 9214 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.