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CVE-2026-103001

6.5 · MEDIUM

PyJWT is a Python implementation of JSON Web Token standards.

Published Sep 30, 2026pyjwt_projectCWE-471EPSS 0.26%

Overview

CVE-2026-103001 is a medium-severity vulnerability affecting pyjwt_project pyjwt. It was published on September 30, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

PyJWT is a Python implementation of JSON Web Token standards. From 2.11.0 through 2.13.0, PyJWT's PyJWT._merge_options() method can modify a caller-supplied mutable options mapping when verify_signature is false. If an application reuses that same mapping for a later decode() or decode_complete() call and changes verify_signature to true, the mapping can retain false values for expiration, not-before, issued-at, audience, issuer, subject, and JWT ID checks. A signed token with invalid registered claims can then be accepted without disabling signature verification, but applications that create a fresh options mapping for each call are not affected.

Remediation

Check the references section for vendor advisories and patches from pyjwt_project. Update pyjwt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
pyjwt_projectpyjwt>= 2.11.0, < 2.13.0Affected

References

GitHubgithub.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35GitHubgithub.com/jpadilla/pyjwt/issues/679GitHubgithub.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2qGitHubgithub.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q

How CyberStrike helps

Frequently asked questions

What is CVE-2026-103001?

CVE-2026-103001 is a medium-severity vulnerability affecting pyjwt_project pyjwt. It was published on September 30, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-103001?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-103001?

Check the references section for vendor advisories and patches from pyjwt_project. Update pyjwt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-103001?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-103001 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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