PyJWT is a Python implementation of JSON Web Token standards. From 2.0.0a1 until 2.15.0, PyJWT PyJWKClient.get_signing_key_from_jwt is affected because payload parser catches ValueError but not RecursionError. This occurs when an attacker-controlled recursively nested payload reaches json.loads. As a result, documented PyJWT exception handling does not contain the failure. Consequently, an unauthenticated request can raise an exception that may produce an HTTP 500 response. The advisory-defined affected implementation also includes jwt/api_jwt.py, verify_signature=False. This issue is fixed in version 2.15.0.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - PyJWT is a Python implementation of JSON Web Token standards. From 2.0.0a1 until 2.15.0, PyJWT
    PyJWKClient.get_signing_key_from_jwt is affected because payload parser catches ValueError but not
    RecursionError. This occurs when an attacker-controlled recursively nested payload reaches json.loads. As
    a result, documented PyJWT exception handling does not contain the failure. Consequently, an
    unauthenticated request can raise an exception that may produce an HTTP 500 response. The advisory-defined
    affected implementation also includes jwt/api_jwt.py, verify_signature=False. This issue is fixed in
    version 2.15.0. (CVE-2026-101918)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - PyJWT is a Python implementation of JSON Web Token standards. From 2.0.0a1 until 2.15.0, PyJWT     PyJWKClient.get_signing_key_from_jwt is affected because payload parser catches ValueError but not     RecursionError. This occurs when an attacker-controlled recursively nested payload reaches json.loads. As     a result, documented PyJWT exception handling does not contain the failure. Consequently, an     unauthenticated request can raise an exception that may produce an HTTP 500 response. The advisory-defined     affected implementation also includes jwt/api_jwt.py, verify_signature=False. This issue is fixed in     version 2.15.0. (CVE-2026-101918)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
471080	Echo: pyjwt: security update to 2.15.0	Tenable Cloud Security	Echo Local Security Checks	Local	high
471080	Echo: pyjwt: security update to 2.15.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
351326	Linux Distros Unpatched Vulnerability : CVE-2026-101918	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-101918

high

Tenable Plugins

high

high

high