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Fencer Intel
high 7.4

CVE-2026-102271 json

PyJWT: Public keys in DER form are accepted as HMAC secrets, bypassing the CVE-2022-29217 guard

published last mo. modified last mo. also EUVD-2026-88539 , GHSA-p4g4-x82p-q773 , PYSEC-2026-4149

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

PyJWT is a Python implementation of JSON Web Token standards. From 2.4.0 until 2.14.0, PyJWT HMACAlgorithm.prepare_key is affected because asymmetric-key guard relies on textual markers that are absent from DER encoding. This occurs when an application mixes HMAC and asymmetric algorithms and supplies a DER public key as the shared verification key. As a result, PyJWT uses public DER bytes as an HMAC secret. Consequently, an attacker who knows the public key can forge authenticated HMAC tokens. This issue is fixed in version 2.14.0.

Patch / fix

  • pypi pyjwt 2.14.0
  • pyjwt_project pyjwt 2.14.0
  • pyjwt Debian 14 2.14.0-1

debian advisories DEBIAN-CVE-2026-102271

  • pyjwt Ubuntu 22.04 LTS 2.3.0-1ubuntu0.5
  • pyjwt Ubuntu 24.04 LTS 2.7.0-1ubuntu0.3
  • pyjwt Ubuntu 26.10 2.13.0-1ubuntu1
  • pyjwt Ubuntu 26.04 LTS 2.10.1-4ubuntu1.2
  • pyjwt Ubuntu Pro 16.04 LTS 1.3.0-1ubuntu0.1+esm3
  • pyjwt Ubuntu Pro 18.04 LTS 1.5.3+ds1-1ubuntu0.1+esm3
  • pyjwt Ubuntu Pro 20.04 LTS 1.7.1-2ubuntu2.1+esm3

ubuntu advisories UBUNTU-CVE-2026-102271

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-PyJWT SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +9 more 2.8.0-150400.8.20.1
  • python-PyJWT Linux Micro 6.1 2.12.1-slfo.1.1_3.1
  • python-PyJWT SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.12.1-160000.3.1
  • python-PyJWT Linux Micro 6.0 2.9.0-159998.1.1

suse advisories SUSE-SU-2026:5064-1SUSE-SU-2026:24377-1SUSE-SU-2026:24126-1SUSE-SU-2026:24219-1SUSE-SU-2026:24134-1

  • python-PyJWT openSUSE Leap 16.0 2.12.1-160000.3.1

opensuse advisories openSUSE-SU-2026:22074-1

  • fence-virt AlmaLinux 9 4.10.0-110.el9_8.8
  • fence-agents-all AlmaLinux 9 4.10.0-110.el9_8.8
  • fence-agents-apc AlmaLinux 9 4.10.0-110.el9_8.8
  • fence-agents-aws AlmaLinux 9 4.10.0-110.el9_8.8
  • fence-agents-gce AlmaLinux 9 4.10.0-110.el9_8.8
  • fence-agents-rsa AlmaLinux 9 4.10.0-110.el9_8.8
  • ha-cloud-support AlmaLinux 9 4.10.0-110.el9_8.8
  • fence-agents-lpar AlmaLinux 9 4.10.0-110.el9_8.8

almalinux advisories ALSA-2026:94500ALSA-2026:94501

  • fence-agents Rocky Linux 10 4.16.0-21.el10_2.7
  • fence-agents Rocky Linux 9 4.10.0-110.el9_8.8

rocky linux advisories RLSA-2026:94501RLSA-2026:94500

  • python-jwt Azure Linux 3.0 2.15.1-1

azure linux advisories AZL-105221

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-102271 updated cvss 7.4

pyjwt: PyJWT: Authentication bypass via acceptance of DER public keys as HMAC secrets

  • Red Hat Ansible Automation Orchestrator 2026 ansible-automation-platform/automation-orchestrator-backend-rhel9 Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-podvm-builder-rhel9 Red Hat Fence Agents Remediation Operator workload-availability/fence-agents-remediation-rhel9-operator Red Hat Lightspeed Core lightspeed-core/rag-tool-cpu-rhel9, lightspeed-core/lightspeed-stack-rhel9, lightspeed-core/rag-tool-cuda-12.9-rhel9 Red Hat Migration Toolkit for Applications 8 mta/mta-solution-server-rhel9
    affected: workaround, no fix available
  • Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-ocp-rag-rhel9, openshift-lightspeed/lightspeed-service-api-rhel9, openshift-lightspeed/lightspeed-agentic-sandbox-rhel9, openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat AI Inference Server rhaii/vllm-tpu-rhel9, rhaii/vllm-neuron-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-27/hub-rhel9, ansible-automation-platform-27/ee-supported-rhel9, ansible-automation-platform-26/eda-controller-rhel9, ansible-automation-platform-27/eda-controller-rhel9
    affected: workaround, no fix available
  • Red Hat Ceph Storage 4 python2-jwt Red Hat Ceph Storage 7 rhceph/rhceph-7-rhel9 Red Hat Ceph Storage 9 rhceph/rhceph-9-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-gaudi-rhel9 Red Hat OpenShift AI (RHOAI) rhoai/odh-ogx-core-rhel9, rhoai/odh-feature-server-rhel9, rhoai/odh-llm-d-kv-cache-rhel9, rhoai/odh-llama-stack-core-rhel9, rhoai/odh-th-torch-cuda-py312-rhel9, rhoai/odh-kserve-autogluon-server-rhel9, +17 more Red Hat OpenShift Container Platform 4 openshift4/ose-ansible-operator Red Hat OpenShift Container Platform 5 python-pyjwt Red Hat OpenShift Virtualization 4 container-native-virtualization/ocp-virt-validation-checkup-rhel9
    affected: workaround, no fix available
  • Red Hat Satellite 6 python-pyjwt, python3-pyjwt, python3.12-pyjwt, satellite/foreman-mcp-server-rhel9, satellite/iop-host-inventory-rhel9 Red Hat Update Infrastructure 4 for Cloud Providers python-pyjwt Red Hat Update Infrastructure 5 rhui5/rhua-rhel9, rhui5/rhua-tp-rhel9
    under investigation
  • Red Hat AI Inference Server 3.5 rhaii/vllm-cpu-rhel9 1791473614, rhaii/vllm-cuda-rhel9 1791473631, rhaii/vllm-rocm-rhel9 1791425869, rhaii/vllm-gaudi-rhel9 1791427182, rhaii/vllm-spyre-rhel9 1791818357
    fixed: vendor fix RHSA-2026:82415
show 17 more
  • Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/gateway-rhel9 1791971533, ansible-automation-platform-26/ee-supported-rhel9 1791974220, ansible-automation-platform-tech-preview/metrics-service-rhel9 1791944819
    fixed: vendor fix RHSA-2026:87120
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9 python3.12-pyjwt 2.14.0-1.el9ap, python3.12-pyjwt+crypto 2.14.0-1.el9ap
    fixed: vendor fix RHSA-2026:87004
  • Red Hat Ansible Automation Platform 2.7 ansible-automation-platform-27/gateway-rhel9 1792429216, ansible-automation-platform-27/metrics-service-rhel9 1792387216
    fixed: vendor fix RHSA-2026:87124
  • Red Hat Enterprise Linux AI 3.5 rhelai3/bootc-cuda-rhel9 1793135861, rhelai3/bootc-rocm-rhel9 1793135863, rhelai3/bootc-aws-cuda-rhel9 1793194817, rhelai3/bootc-gcp-cuda-rhel9 1793194815, rhelai3/disk-image-cuda-rhel9 1793206758, rhelai3/bootc-azure-cuda-rhel9 1793194815, +1 more
    fixed: vendor fix RHSA-2026:92452
  • Red Hat Enterprise Linux AppStream (v. 9) fence-virt 4.10.0-110.el9_8.8, fence-virtd 4.10.0-110.el9_8.8, fence-agents 4.10.0-110.el9_8.8, fence-virtd-cpg 4.10.0-110.el9_8.8, fence-virtd-tcp 4.10.0-110.el9_8.8, fence-agents-all 4.10.0-110.el9_8.8, +51 more
    fixed: vendor fix RHSA-2026:94500
  • Red Hat Enterprise Linux AppStream (v. 10) fence-virt 4.16.0-21.el10_2.7, fence-virtd 4.16.0-21.el10_2.7, fence-agents 4.16.0-21.el10_2.7, fence-virtd-cpg 4.16.0-21.el10_2.7, fence-virtd-tcp 4.16.0-21.el10_2.7, fence-agents-all 4.16.0-21.el10_2.7, +50 more
    fixed: vendor fix RHSA-2026:94501
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) fence-virt 4.10.0-43.el9_2.27, fence-virtd 4.10.0-43.el9_2.27, fence-agents 4.10.0-43.el9_2.27, fence-virtd-cpg 4.10.0-43.el9_2.27, fence-virtd-tcp 4.10.0-43.el9_2.27, fence-agents-virsh 4.10.0-43.el9_2.27, +8 more
    fixed: vendor fix RHSA-2026:94634
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) fence-virt 4.10.0-62.el9_4.31, fence-virtd 4.10.0-62.el9_4.31, fence-agents 4.10.0-62.el9_4.31, fence-virtd-cpg 4.10.0-62.el9_4.31, fence-virtd-tcp 4.10.0-62.el9_4.31, fence-agents-virsh 4.10.0-62.el9_4.31, +8 more
    fixed: vendor fix RHSA-2026:94557
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) fence-virt 4.16.0-5.el10_0.14, fence-virtd 4.16.0-5.el10_0.14, fence-agents 4.16.0-5.el10_0.14, fence-virtd-cpg 4.16.0-5.el10_0.14, fence-virtd-tcp 4.16.0-5.el10_0.14, fence-agents-all 4.16.0-5.el10_0.14, +50 more
    fixed: vendor fix RHSA-2026:95012
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) fence-virt 4.10.0-86.el9_6.23, fence-virtd 4.10.0-86.el9_6.23, fence-agents 4.10.0-86.el9_6.23, fence-virtd-cpg 4.10.0-86.el9_6.23, fence-virtd-tcp 4.10.0-86.el9_6.23, fence-agents-all 4.10.0-86.el9_6.23, +51 more
    fixed: vendor fix RHSA-2026:94523
  • Red Hat Enterprise Linux High Availability E4S (v.9.2) fence-agents-all 4.10.0-43.el9_2.27, fence-agents-apc 4.10.0-43.el9_2.27, fence-agents-aws 4.10.0-43.el9_2.27, fence-agents-eps 4.10.0-43.el9_2.27, fence-agents-gce 4.10.0-43.el9_2.27, fence-agents-rsa 4.10.0-43.el9_2.27, +37 more
    fixed: vendor fix RHSA-2026:94634
  • Red Hat Enterprise Linux High Availability E4S (v.9.4) fence-agents-all 4.10.0-62.el9_4.31, fence-agents-apc 4.10.0-62.el9_4.31, fence-agents-aws 4.10.0-62.el9_4.31, fence-agents-eps 4.10.0-62.el9_4.31, fence-agents-gce 4.10.0-62.el9_4.31, fence-agents-rsa 4.10.0-62.el9_4.31, +37 more
    fixed: vendor fix RHSA-2026:94557
  • Red Hat Enterprise Linux Resilient Storage E4S (v.9.2) fence-agents-all 4.10.0-43.el9_2.27, fence-agents-apc 4.10.0-43.el9_2.27, fence-agents-aws 4.10.0-43.el9_2.27, fence-agents-eps 4.10.0-43.el9_2.27, fence-agents-gce 4.10.0-43.el9_2.27, fence-agents-rsa 4.10.0-43.el9_2.27, +36 more
    fixed: vendor fix RHSA-2026:94634
  • Red Hat Enterprise Linux Resilient Storage E4S (v.9.4) fence-agents-all 4.10.0-62.el9_4.31, fence-agents-apc 4.10.0-62.el9_4.31, fence-agents-aws 4.10.0-62.el9_4.31, fence-agents-eps 4.10.0-62.el9_4.31, fence-agents-gce 4.10.0-62.el9_4.31, fence-agents-rsa 4.10.0-62.el9_4.31, +36 more
    fixed: vendor fix RHSA-2026:94557
  • Red Hat OpenShift AI 3.4 rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9 1792798552
    fixed: vendor fix RHSA-2026:92510
  • Red Hat Trusted Artifact Signer 1.5 rhtas/rh-sigstore-a2a-rhel9 1793624122, rhtas/model-transparency-rhel9 1793696578
    fixed: vendor fix RHSA-2026:95261
  • Red Hat AI Inference Server rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9, rhaiis/vllm-cuda-rhel9, rhaiis/vllm-rocm-rhel9 Red Hat Ansible Automation Platform 2 python-pyjwt, python3x-pyjwt, python3.11-pyjwt, automation-controller, ansible-automation-platform-24/hub-rhel8, ansible-automation-platform-25/hub-rhel8, +21 more Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/hub-rhel9 1791947385, ansible-automation-platform-26/hub-web-rhel9 1791952205, ansible-automation-platform-26/receptor-rhel9 1791968536, ansible-automation-platform-26/mcp-tools-rhel9 1791941340, ansible-automation-platform-26/controller-rhel9 1791947602, ansible-automation-platform-26/de-minimal-rhel9 1791961810, +22 more Red Hat Ansible Automation Platform 2.6 for RHEL 9 receptor 1.6.9-1.el9ap, molecule 26.10.0-1.el9ap, receptorctl 1.6.9-1.el9ap, ansible-lint 26.10.1-1.el9ap, ansible-rulebook 1.2.3-1.el9ap, automation-hub 4.11.15-1.el9ap, +50 more
    not affected: vulnerable code not present

14 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/jpadilla/pyjwt/security/advisories/GHSA-p4g4-x82p-q773 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
OSV 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
pypi pyjwt
>=2.4.0, <2.14.0
2.14.0

Affected products

  • jpadilla pyjwt

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.