CVE-2020-26244: Python oic is a Python OpenID Connect implementation

Q: How do I fix CVE-2020-26244?

python openid connect: upgrade to 1.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-26244 being exploited?

CVE-2020-26244 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-26244 affect?

CVE-2020-26244 affects python openid connect. Severity is medium (CVSS 6.8). 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 algorit

Q: How urgent is CVE-2020-26244?

Priority 38/100. No elevated risk signals yet.

Routine

MEDIUM 6.8UPGRADE

CVE-2020-26244 is a medium-severity flaw (CVSS 6.8) affecting python openid connect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 IdToke

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-325, CWE-347
Published	2020-12-02
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: python openid connect project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-02 20:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

python openid connect project python openid connect UPGRADE

Affected: < 1.2.1

Fixed in: 1.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy python-openid-connect || rpm -q python-openid-connect || python-openid-connect --version

2. UPGRADE to 1.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade python-openid-connect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade python-openid-connect

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-26244?

python openid connect: upgrade to 1.2.1. Exact commands for each OS are on this page.

Is CVE-2020-26244 being exploited?

CVE-2020-26244 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-26244 affect?

CVE-2020-26244 affects python openid connect. Severity is medium (CVSS 6.8). 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 algorit

How urgent is CVE-2020-26244?

Priority 38/100. No elevated risk signals yet.

Software pages

Python vulnerabilities

References

← Back to latest CVEs