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CVE-2020-26244

22
FAUCET Score

CVE-2020-26244 describes multiple cryptographic vulnerabilities in the Python oic library (python_openid_connect_project python_openid_connect) prior to version 1.2.1. These issues include insufficient validation of IdToken signatures and the 'none' algorithm, and a lack of 'iat' claim sanity checks, potentially leading to unverified tokens being accepted. With a CVSS score of 6.8 (Medium), successful exploitation requires low privileges and high attack complexity but could result in high confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.1CPE matchmatch criteria
cpe:2.3:a:python_openid_connect_project:python_openid_connect:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.82%
Probability of exploitation in next 30 days
EPSS Percentile
53.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0082 is in the 42nd percentile among its peer group of 1,425 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: oicFixed in: 1.2.1

Vendor Advisories (1)

pipGHSA-4fjv-pmhg-3rfghigh

Multiple cryptographic issues in Python oic

Dec 4, 2020

References

github.com / OpenIDC/pyoidc/commit/62f8d753fa17c8b1f29f8be639cf0b33afb02498
PatchThird Party Advisory
github.com / OpenIDC/pyoidc/releases/tag/1.2.1
Third Party Advisory
github.com / OpenIDC/pyoidc/security/advisories/GHSA-4fjv-pmhg-3rfg
Third Party Advisory
pypi.org / project/oic
ProductVendor Advisory