CVE-2026-48522 PyJWKClient: missing scheme allowlist enables SSRF + token forgery via file://, ftp://, data: schemes
MediumCVSS 4.2
EPSS 0.22%
- Published
- Updated
- Exploit status
- No public exploit known
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jpadilla pyjwt | = < 2.13.0 | No fix listed |
| debian/pyjwt(Debian:12) | All versions | No fix listed |
| debian/pyjwt(Debian:14) | < 2.13.0-1 | 2.13.0-1 |
| debian/pyjwt(Debian:13) | All versions | No fix listed |
| pypi pyjwt(PyPI) | >= 2.0.0, < 2.13.0 | 2.13.0 |
| pypi pyjwt(PyPI) | = 2.0.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.0.1 | No fix listed |
| pypi pyjwt(PyPI) | = 2.1.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.10.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.10.1 | No fix listed |
| pypi pyjwt(PyPI) | = 2.11.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.12.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.12.1 | No fix listed |
| pypi pyjwt(PyPI) | = 2.2.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.3.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.4.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.5.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.6.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.7.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.8.0 | No fix listed |
| pypi pyjwt(PyPI) | = 2.9.0 | No fix listed |
| pypi pyjwt(PyPI) | < 2.13.0 | 2.13.0 |
| pypi pyjwt(PyPI) | = 0.1.1 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.2 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.3 | No fix listed |
Show 154 more
| Product | Affected versions | Fixed in |
|---|---|---|
| pypi pyjwt(PyPI) | = 0.1.4 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.5 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.6 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.7 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.8 | No fix listed |
| pypi pyjwt(PyPI) | = 0.1.9 | No fix listed |
| pypi pyjwt(PyPI) | = 0.2.0 | No fix listed |
| pypi pyjwt(PyPI) | = 0.2.1 | No fix listed |
| pypi pyjwt(PyPI) | = 0.2.3 | No fix listed |
| pypi pyjwt(PyPI) | = 0.3.0 | No fix listed |
| pypi pyjwt(PyPI) | = 0.3.1 | No fix listed |
| pypi pyjwt(PyPI) | = 0.3.2 | No fix listed |
| pypi pyjwt(PyPI) | = 0.4.0 | No fix listed |
| pypi pyjwt(PyPI) | = 0.4.1 | No fix listed |
| pypi pyjwt(PyPI) | = 0.4.2 | No fix listed |
| pypi pyjwt(PyPI) | = 0.4.3 | No fix listed |
| pypi pyjwt(PyPI) | = 1.0.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.0.1 | No fix listed |
| pypi pyjwt(PyPI) | = 1.1.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.3.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.4.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.4.1 | No fix listed |
| pypi pyjwt(PyPI) | = 1.4.2 | No fix listed |
| pypi pyjwt(PyPI) | = 1.5.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.5.1 | No fix listed |
| pypi pyjwt(PyPI) | = 1.5.2 | No fix listed |
| pypi pyjwt(PyPI) | = 1.5.3 | No fix listed |
| pypi pyjwt(PyPI) | = 1.6.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.6.1 | No fix listed |
| pypi pyjwt(PyPI) | = 1.6.3 | No fix listed |
| pypi pyjwt(PyPI) | = 1.6.4 | No fix listed |
| pypi pyjwt(PyPI) | = 1.7.0 | No fix listed |
| pypi pyjwt(PyPI) | = 1.7.1 | No fix listed |
| pypi pyjwt(PyPI) | = 2.0.0a1 | No fix listed |
| pypi pyjwt(PyPI) | = 2.0.0a2 | No fix listed |
| redhat/mta/mta-solution-server-rhel9(Red Hat:migration_toolkit_applications:8) | All versions | No fix listed |
| redhat/openshift-lightspeed/lightspeed-ocp-rag-rhel9(Red Hat:openshift_lightspeed:1) | All versions | No fix listed |
| redhat/openshift-lightspeed/lightspeed-service-api-rhel9(Red Hat:openshift_lightspeed:1) | All versions | No fix listed |
| redhat/openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9(Red Hat:openshift_lightspeed:1) | All versions | No fix listed |
| redhat/rhaiis/vllm-cpu-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaiis/vllm-cuda-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaiis/vllm-rocm-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaiis/vllm-tpu-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-cpu-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-cuda-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-gaudi-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-neuron-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-rocm-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-spyre-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/rhaii/vllm-tpu-rhel9(Red Hat:ai_inference_server:3) | All versions | No fix listed |
| redhat/ansible-automation-platform-24/lightspeed-rhel8(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-25/ee-supported-rhel8(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-25/lightspeed-chatbot-rhel8(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-25/lightspeed-rhel8(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/controller-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/eda-controller-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/ee-supported-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/gateway-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/hub-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/lightspeed-chatbot-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/lightspeed-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-26/mcp-tools-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/controller-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/eda-controller-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/ee-supported-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/gateway-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/hub-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/lightspeed-chatbot-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/lightspeed-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/mcp-tools-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-27/metrics-service-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform/automation-dashboard-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/ansible-automation-platform-tech-preview/metrics-service-rhel9(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/automation-controller(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/python-pyjwt(Red Hat:ansible_automation_platform:2) | All versions | No fix listed |
| redhat/fence-agents(Red Hat:enterprise_linux:10) | All versions | No fix listed |
| redhat/fence-agents(Red Hat:enterprise_linux:9) | All versions | No fix listed |
| redhat/rhelai3/bootc-aws-cuda-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/rhelai3/bootc-azure-cuda-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/rhelai3/bootc-azure-rocm-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/rhelai3/bootc-cuda-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/rhelai3/bootc-gaudi-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/rhelai3/bootc-gcp-cuda-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/rhelai3/bootc-rocm-rhel9(Red Hat:enterprise_linux_ai:3) | All versions | No fix listed |
| redhat/llvm(Red Hat:hummingbird:1) | All versions | No fix listed |
| redhat/llvm21(Red Hat:hummingbird:1) | All versions | No fix listed |
| redhat/rust(Red Hat:hummingbird:1) | All versions | No fix listed |
| redhat/rhoai/odh-feature-server-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-kserve-agent-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-kserve-controller-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-kserve-router-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-kserve-storage-initializer-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-llama-stack-core-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-llm-d-kv-cache-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-model-registry-job-async-upload-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-pipeline-runtime-tensorflow-cuda-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-pipeline-runtime-tensorflow-rocm-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-vllm-gaudi-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-tensorflow-cuda-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9(Red Hat:openshift_ai) | All versions | No fix listed |
| redhat/quay/quay-rhel8(Red Hat:quay:3) | All versions | No fix listed |
| redhat/quay/quay-rhel9(Red Hat:quay:3) | All versions | No fix listed |
| redhat/python-pyjwt(Red Hat:satellite:6) | All versions | No fix listed |
| redhat/satellite:el8/python-pyjwt(Red Hat:satellite:6) | All versions | No fix listed |
| redhat/satellite/foreman-mcp-server-rhel9(Red Hat:satellite:6) | All versions | No fix listed |
| redhat/satellite/iop-host-inventory-rhel9(Red Hat:satellite:6) | All versions | No fix listed |
| redhat/rhtas/model-transparency-rhel9(Red Hat:trusted_artifact_signer:1) | All versions | No fix listed |
| redhat/rhtas/segment-reporting-rhel9(Red Hat:trusted_artifact_signer:1) | All versions | No fix listed |
| redhat/python-pyjwt(Red Hat:rhui:4::el8) | All versions | No fix listed |
| pypi pyjwt(PyPI) | >= 2.0.0, <= 2.12.1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.10.1-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.10.1-2 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.10.1-3 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.10.1-4 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.11.0-2 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.12.1-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.13.0-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.14.0-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.15.0-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.15.1-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.6.0-1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.6.0-1+deb12u1 | No fix listed |
| debian/pyjwt(Debian:12) | = 2.7.0-1 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.10.1-2 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.10.1-2+deb13u1 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.10.1-3 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.10.1-4 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.11.0-2 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.12.1-1 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.13.0-1 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.14.0-1 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.15.0-1 | No fix listed |
| debian/pyjwt(Debian:13) | = 2.15.1-1 | No fix listed |
| debian/pyjwt(Debian:14) | = 2.10.1-2 | No fix listed |
| debian/pyjwt(Debian:14) | = 2.10.1-3 | No fix listed |
| debian/pyjwt(Debian:14) | = 2.10.1-4 | No fix listed |
| debian/pyjwt(Debian:14) | = 2.11.0-2 | No fix listed |
| debian/pyjwt(Debian:14) | = 2.12.1-1 | No fix listed |
| ubuntu/pyjwt(Ubuntu:22.04) | < 2.3.0-1ubuntu0.4 | 2.3.0-1ubuntu0.4 |
| ubuntu/pyjwt(Ubuntu:24.04) | < 2.7.0-1ubuntu0.2 | 2.7.0-1ubuntu0.2 |
| ubuntu/pyjwt(Ubuntu:26.04) | < 2.10.1-4ubuntu1.1 | 2.10.1-4ubuntu1.1 |
| pyjwt project pyjwt | < 2.13.0 | 2.13.0 |
| azure linux python-jwt(Azure Linux:3.0) | < 2.13.0-1 | 2.13.0-1 |
References
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-993g-76c3-p5m4 exploit mitigation vendor-advisory
- Debian Security Tracker CVE-2026-48522 vendor-advisory
- bugs.debian.org issue-tracking
- nvd.nist.gov third-party-advisory vendor-advisory
- github.com patch
- github.com product
- github.com
- MSRC Security Update Guide vendor-advisory
- CBL-Mariner Releases vendor-advisory
- Red Hat CVE page mitigation vendor-advisory
- Red Hat Bugzilla 2482753 issue-tracking
- www.cve.org
- github.com
- Ubuntu CVE tracker vendor-advisory
- USN-8823-1 vendor-advisory