HIGH 7.5 Microsoft
CVE-2026-55553
urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage
Microsoft Security Update 2026-Aug: urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage
Affected Products
- azl3 python-urllib3 2.0.7-6 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55553
- https://nvd.nist.gov/vuln/detail/CVE-2026-55553
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-11 via Microsoft. Affected: azl3 python-urllib3 2.0.7-6 on Azure Linux 3.0.
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