HIGH 7.4 Microsoft
CVE-2026-48526
PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed
Microsoft Security Update 2026-May: PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed
Affected Products
- azl3 python-jwt 2.8.0-2 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48526
- https://nvd.nist.gov/vuln/detail/CVE-2026-48526
This high severity vulnerability with a CVSS score of 7.4 was published on 2026-05-12 via Microsoft. Affected: azl3 python-jwt 2.8.0-2 on Azure Linux 3.0.
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