Upstream information
Description
PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, PyJWKClient passes its uri argument directly to urllib.request.urlopen() which uses Python stdlib's default OpenerDirector registering HTTPHandler, HTTPSHandler, FTPHandler, FileHandler, and DataHandler. There is currently no documented option to restrict which schemes PyJWKClient will fetch. If an application's jku URL ingestion path accepts attacker-influenced URLs (e.g., from JWT header, configuration file, OAuth flow parameter), the attacker can cause PyJWKClient to read arbitrary local files via file:// (SSRF on local filesystem), cause PyJWKClient to attempt FTP / data-URI fetches (broader SSRF surface), or forge tokens that PyJWT verifies as valid. The library does not directly return non-HTTP(S) URI contents to the attacker; the chained "plant a JWKS to forge tokens" scenario described in the original report requires additional application-layer flaws (attacker write access to a filesystem path, untrusted jku derivation) that this fix does not address. This vulnerability is fixed in 2.13.0.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 4.2 | 4.8 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | None | None |
| User Interaction | Required | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | Low | Low |
| Integrity Impact | Low | Low |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 6.3 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Attack Requirements | Present |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | Low |
| Vulnerable System Integrity Impact | Low |
| Vulnerable System Availability Impact | None |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 12 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | python-PyJWT | Affected |
| SUSE Linux Enterprise Micro 5.5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP7 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 16.0 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 16.1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | python-PyJWT | Affected |
| SUSE Linux Micro 6.0 | python-PyJWT | Affected |
| SUSE Linux Micro 6.1 | python-PyJWT | Affected |
| SUSE Linux Micro 6.2 | python-PyJWT | Affected |
| openSUSE Leap 16.0 | python-PyJWT | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Public Cloud 12 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 12 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP6 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-PyJWT | Affected |
| SUSE Manager Proxy 4.3 | python-PyJWT | Affected |
| SUSE Manager Proxy LTS 4.3 | python-PyJWT | Affected |
| SUSE Manager Retail Branch Server 4.3 | python-PyJWT | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | python-PyJWT | Affected |
| SUSE Manager Server 4.3 | python-PyJWT | Affected |
| SUSE Manager Server LTS 4.3 | python-PyJWT | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 3.0 | python-PyJWT | Affected |
| SUSE CaaS Platform 4.0 | python-PyJWT | Affected |
| SUSE Enterprise Storage 6 | python-PyJWT | Affected |
| SUSE Enterprise Storage 7 | python-PyJWT | Affected |
| SUSE Enterprise Storage 7.1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-PyJWT | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 12 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 12 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 12 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | python-PyJWT | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-PyJWT | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-PyJWT | Affected |
| SUSE Manager Proxy 4.0 | python-PyJWT | Affected |
| SUSE Manager Proxy 4.1 | python-PyJWT | Affected |
| SUSE Manager Proxy 4.2 | python-PyJWT | Affected |
| SUSE Manager Retail Branch Server 4.0 | python-PyJWT | Affected |
| SUSE Manager Retail Branch Server 4.1 | python-PyJWT | Affected |
| SUSE Manager Retail Branch Server 4.2 | python-PyJWT | Affected |
| SUSE Manager Server 3.2 | python-PyJWT | Affected |
| SUSE Manager Server 4.0 | python-PyJWT | Affected |
| SUSE Manager Server 4.1 | python-PyJWT | Affected |
| SUSE Manager Server 4.2 | python-PyJWT | Affected |
| SUSE OpenStack Cloud 7 | python-PyJWT | Affected |
| openSUSE Leap 15.3 | python-PyJWT | Affected |
| openSUSE Leap 15.4 | python-PyJWT | Affected |
| openSUSE Leap 15.5 | python-PyJWT | Affected |
| openSUSE Leap 15.6 | python-PyJWT | Affected |
SUSE Timeline for this CVE
CVE page created: Thu May 28 20:18:45 2026CVE page last modified: Fri May 29 11:44:40 2026