Multiple cryptographic issues in Python oic
Impact
- Client implementations using this library
Issues
- The IdToken signature algorithm was not checked automatically, but only if the expected algorithm was passed in as a kwarg.
- JWA
nonealgorithm was allowed in all flows. oic.consumer.Consumer.parse_authzreturns an unverified IdToken. The verification of the token was left to the discretion of the implementator.iatclaim was not checked for sanity (i.e. it could be in the future)
Patches
- IdToken signature is now always checked.
- JWA
nonealgorithm is now allowed only if using theresponse_typecode - IdToken verification is now done automatically.
iatclaim is now checked for sanity.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | oic | < 1.2.1 | 1.2.1 |
References
- https://github.com/OpenIDC/pyoidc/security/advisories/GHSA-4fjv-pmhg-3rfg
- https://github.com/OpenIDC/pyoidc/commit/62f8d753fa17c8b1f29f8be639cf0b33afb02498
- https://pypi.org/project/oic/
- https://github.com/OpenIDC/pyoidc/releases/tag/1.2.1
- https://nvd.nist.gov/vuln/detail/CVE-2020-26244
- https://github.com/OpenIDC/pyoidc
- https://github.com/pypa/advisory-database/tree/main/vulns/oic/PYSEC-2020-69.yaml
- https://pypi.org/project/oic
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-325, CWE-347- Platform
- Python (PyPI)
- Package
oic- Disclosed
- 02.12.2020
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2020-69 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-4fjv-pmhg-3rfg - CC BY 4.0
Vulnerability history: oic
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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