CVE-2020-26244

Python oic is a Python OpenID Connect implementation. In Python oic before version 1.2.1, there are several related cryptographic issues affecting client implementations that use the library. The issues are: 1) The IdToken signature algorithm was not checked automatically, but only if the expected algorithm was passed in as a kwarg. 2) JWA `none` algorithm was allowed in all flows. 3) oic.consumer.Consumer.parse_authz returns an unverified IdToken. The verification of the token was left to the discretion of the implementator. 4) iat claim was not checked for sanity (i.e. it could be in the future). These issues are patched in version 1.2.1.

• CWE-325
• CWE-347
• CWE-347

• https://github.com/OpenIDC/pyoidc/commit/62f8d753fa17c8b1f29f8be639cf0b33afb02498Patch, Third Party Advisory
• https://github.com/OpenIDC/pyoidc/releases/tag/1.2.1Third Party Advisory
• https://github.com/OpenIDC/pyoidc/security/advisories/GHSA-4fjv-pmhg-3rfgThird Party Advisory
• https://pypi.org/project/oic/Product, Vendor Advisory
• https://github.com/OpenIDC/pyoidc/commit/62f8d753fa17c8b1f29f8be639cf0b33afb02498Patch, Third Party Advisory
• https://github.com/OpenIDC/pyoidc/releases/tag/1.2.1Third Party Advisory
• https://github.com/OpenIDC/pyoidc/security/advisories/GHSA-4fjv-pmhg-3rfgThird Party Advisory
• https://pypi.org/project/oic/Product, Vendor Advisory

Published

Dec 2, 2020

Last Modified

Jun 17, 2026

Status

Modified

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