Read the docs
TI-2026-65303 Aliases CVE-2026-102268GHSA-ffc3-869f-jxw9

Improper signature verification in jpadilla pyjwt

Priority HIGH 80CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 18 fixed, 9 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-347.

Summary

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, is_pem_format in jwt/utils.py is affected because is_pem_format does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and supplies a mutated public-key PEM as raw key bytes. As a result, HMACAlgorithm.prepare_key treats the unrecognized asymmetric public key 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00236 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial pyjwt (jpadilla): 2.14.0PyJWT (PyPI): 2.14.0Red Hat: 22 advisoriesRed Hat: 18 fixed, 9 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
jpadillapyjwtbefore 2.14.02.14.0Patch availableCNA
—PyJWT (PyPI)before 2.14.02.14.0Patch availableGHSA-ffc3-869f-jxw9
  • pyjwt Vendorjpadilla Affected before 2.14.0 Fixed in 2.14.0 Patch available CNA
  • PyJWT (PyPI) Vendor— Affected before 2.14.0 Fixed in 2.14.0 Patch available GHSA-ffc3-869f-jxw9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*before 2.14.0Vulnerablejpadilla
  • cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·jpadilla

Remediation

  • Fix · CNA pyjwt (jpadilla) Fixed in 2.14.0
  • Fix · GHSA-ffc3-869f-jxw9 PyJWT (PyPI) Fixed in 2.14.0 Advisory →

Red Hat 22 advisories

  • RHSA-2026:95267 Released 2026-11-04 · Red Hat rating Critical
    RHTAS 1.5.1 - Tech Preview Release Of the Sigstore A2A 0.0.2
    • Red Hat Trusted Artifact Signer 1.5 registry.redhat.io/rhtas/rh-sigstore-a2a-rhel9
  • RHSA-2026:95261 Released 2026-11-04 · Red Hat rating Critical
    RHTAS 1.5.1 - Release of Model Transparency 1.0.6
    • Red Hat Trusted Artifact Signer 1.5 registry.redhat.io/rhtas/model-transparency-rhel9
  • RHSA-2026:95012 Released 2026-11-04 · Red Hat rating Critical
    fence-agents security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) fence-agents-4.16.0-5.el10_0.14, fence-agents-aliyun-4.16.0-5.el10_0.14, fence-agents-all-4.16.0-5.el10_0.14 +47
Show 19 more Red Hat advisories
  • RHSA-2026:94634 Released 2026-11-03 · Red Hat rating Critical
    fence-agents security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) fence-agents-4.10.0-43.el9_2.27, fence-agents-common-4.10.0-43.el9_2.27, fence-agents-compute-4.10.0-43.el9_2.27 +11
    • Red Hat Enterprise Linux High Availability E4S (v.9.2) fence-agents-aliyun-4.10.0-43.el9_2.27, fence-agents-all-4.10.0-43.el9_2.27, fence-agents-amt-ws-4.10.0-43.el9_2.27 +40
    • Red Hat Enterprise Linux Resilient Storage E4S (v.9.2) fence-agents-aliyun-4.10.0-43.el9_2.27, fence-agents-all-4.10.0-43.el9_2.27, fence-agents-amt-ws-4.10.0-43.el9_2.27 +39
  • RHSA-2026:94557 Released 2026-11-03 · Red Hat rating Critical
    fence-agents security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) fence-agents-4.10.0-62.el9_4.31, fence-agents-common-4.10.0-62.el9_4.31, fence-agents-compute-4.10.0-62.el9_4.31 +11
    • Red Hat Enterprise Linux High Availability E4S (v.9.4) fence-agents-aliyun-4.10.0-62.el9_4.31, fence-agents-all-4.10.0-62.el9_4.31, fence-agents-amt-ws-4.10.0-62.el9_4.31 +40
    • Red Hat Enterprise Linux Resilient Storage E4S (v.9.4) fence-agents-aliyun-4.10.0-62.el9_4.31, fence-agents-all-4.10.0-62.el9_4.31, fence-agents-amt-ws-4.10.0-62.el9_4.31 +39
  • RHSA-2026:94523 Released 2026-11-03 · Red Hat rating Critical
    fence-agents security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) fence-agents-4.10.0-86.el9_6.23, fence-agents-aliyun-4.10.0-86.el9_6.23, fence-agents-all-4.10.0-86.el9_6.23 +47
  • RHSA-2026:94500 Released 2026-11-03 · Red Hat rating Critical
    fence-agents security update
    • Red Hat Enterprise Linux AppStream (v. 9) fence-agents-4.10.0-110.el9_8.8, fence-agents-aliyun-4.10.0-110.el9_8.8, fence-agents-all-4.10.0-110.el9_8.8 +47
  • RHSA-2026:94501 Released 2026-11-03 · Red Hat rating Critical
    fence-agents security update
    • Red Hat Enterprise Linux AppStream (v. 10) fence-agents-4.16.0-21.el10_2.7, fence-agents-aliyun-4.16.0-21.el10_2.7, fence-agents-all-4.16.0-21.el10_2.7 +47
  • RHSA-2026:92667 Released 2026-10-29 · Red Hat rating Critical
    satellite/foreman-mcp-server-rhel9 container image available as a Technology Preview
    • Red Hat Satellite 6.18 registry.redhat.io/satellite/foreman-mcp-server-rhel9
  • RHSA-2026:92666 Released 2026-10-29 · Red Hat rating Critical
    satellite/foreman-mcp-server-rhel9 container image available as a Technology Preview
    • Red Hat Satellite 6.19 registry.redhat.io/satellite/foreman-mcp-server-rhel9
  • RHSA-2026:92583 Released 2026-10-29 · Red Hat rating Critical
    General availability of the satellite/iop-host-inventory-rhel9 container image
    • Red Hat Satellite 6.18 registry.redhat.io/satellite/iop-host-inventory-rhel9
  • RHSA-2026:92566 Released 2026-10-29 · Red Hat rating Critical
    General availability of the satellite/iop-host-inventory-rhel9 container image
    • Red Hat Satellite 6.19 registry.redhat.io/satellite/iop-host-inventory-rhel9
  • RHSA-2026:92452 Released 2026-10-29 · Red Hat rating Critical
    Red Hat Enterprise Linux AI 3.5.2 enhancement update
    • Red Hat Enterprise Linux AI 3.5 registry.redhat.io/rhelai3/bootc-aws-cuda-rhel9, registry.redhat.io/rhelai3/bootc-azure-cuda-rhel9, registry.redhat.io/rhelai3/bootc-azure-rocm-rhel9 +3
  • RHSA-2026:92449 Released 2026-10-29 · Red Hat rating Critical
    Red Hat Enterprise Linux AI 3.5.2 enhancement update
    • Red Hat Enterprise Linux AI 3.5 registry.redhat.io/rhelai3/disk-image-cuda-rhel9
  • RHSA-2026:87124 Released 2026-10-21 · Red Hat rating Critical
    Red Hat Ansible Automation Platform 2.7 Container Release Update
    • Red Hat Ansible Automation Platform 2.7 registry.redhat.io/ansible-automation-platform-27/de-supported-rhel9, registry.redhat.io/ansible-automation-platform-27/eda-controller-rhel9, registry.redhat.io/ansible-automation-platform-27/ee-supported-rhel9 +8
  • RHSA-2026:87120 Released 2026-10-21 · Red Hat rating Critical
    Red Hat Ansible Automation Platform 2.6 Container Release Update
    • Red Hat Ansible Automation Platform 2.6 registry.redhat.io/ansible-automation-platform-26/eda-controller-rhel9, registry.redhat.io/ansible-automation-platform-26/ee-supported-rhel9, registry.redhat.io/ansible-automation-platform-26/gateway-rhel9 +8
  • RHSA-2026:84785 Released 2026-10-19 · Red Hat rating Critical
    RHTAS 1.4.4 - Release of Model Transparency 1.0.5
    • Red Hat Trusted Artifact Signer 1.4 registry.redhat.io/rhtas/model-transparency-rhel9
  • RHSA-2026:82415 Released 2026-10-13 · Red Hat rating Critical
    Red Hat AI Inference 3.5.2 (cpu)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-cpu-rhel9
  • RHSA-2026:82371 Released 2026-10-13 · Red Hat rating Critical
    Red Hat AI Inference 3.5.2 (spyre)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-spyre-rhel9
  • RHSA-2026:82368 Released 2026-10-13 · Red Hat rating Critical
    Red Hat AI Inference 3.5.2 (cuda)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-cuda-rhel9
  • RHSA-2026:82061 Released 2026-10-13 · Red Hat rating Critical
    Red Hat AI Inference Tech Preview 3.5.2 (Gaudi)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-gaudi-rhel9
  • RHSA-2026:82059 Released 2026-10-13 · Red Hat rating Critical
    Red Hat AI Inference 3.5.2 (ROCm)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-rocm-rhel9

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
Lightspeed CoreAffectedNo fix yet
Red Hat Ansible Automation Platform 2AffectedNo fix yet
Red Hat Ceph Storage 4AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 7AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat Quay 3AffectedNo fix yet
Red Hat Satellite 6AffectedNo fix yet
Red Hat Update Infrastructure 5AffectedNo fix yet
Red Hat AI Inference Server 3.5Fixed RHSA-2026:82059, RHSA-2026:82061, RHSA-2026:82368, RHSA-2026:82371, RHSA-2026:82415
Red Hat Ansible Automation Platform 2.6Fixed RHSA-2026:87120
Red Hat Ansible Automation Platform 2.7Fixed RHSA-2026:87124
Red Hat Enterprise Linux AI 3.5Fixed RHSA-2026:92449, RHSA-2026:92452
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:94501
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:94500
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:94634
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:94557
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:95012
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:94523
Red Hat Enterprise Linux High Availability E4S (v.9.2)Fixed RHSA-2026:94634
Red Hat Enterprise Linux High Availability E4S (v.9.4)Fixed RHSA-2026:94557
Red Hat Enterprise Linux Resilient Storage E4S (v.9.2)Fixed RHSA-2026:94634
Red Hat Enterprise Linux Resilient Storage E4S (v.9.4)Fixed RHSA-2026:94557
Red Hat Satellite 6.18Fixed RHSA-2026:92583, RHSA-2026:92667
Red Hat Satellite 6.19Fixed RHSA-2026:92566, RHSA-2026:92666
Red Hat Trusted Artifact Signer 1.4Fixed RHSA-2026:84785
Red Hat Trusted Artifact Signer 1.5Fixed RHSA-2026:95261, RHSA-2026:95267
Not affected: 21 products
  • Ansible Automation Orchestrator 2026
  • Confidential Compute Attestation
  • Fence Agents Remediation Operator
  • Migration Toolkit for Applications 8
  • OpenShift Lightspeed
  • Red Hat AI Inference Server
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ansible Automation Platform 2.6
  • Red Hat Ansible Automation Platform 2.7
  • Red Hat Enterprise Linux AI (RHEL AI) 3
  • Red Hat Enterprise Linux command line assistant
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5
  • Red Hat OpenShift Virtualization 4
  • Red Hat OpenStack Platform 13 (Queens)
  • Red Hat OpenStack Platform 16.2
  • Red Hat OpenStack Platform 17.1
  • Red Hat OpenStack Platform 18.0
  • Red Hat Update Infrastructure 4 for Cloud Providers
  • Red Hat Update Infrastructure 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-102268
  2. 2026-10-03 Alias added: GHSA-ffc3-869f-jxw9
  3. 2026-10-13 Fix available: RHSA-2026:82061 · Red Hat
  4. 2026-10-13 Fix available: RHSA-2026:82059 · Red Hat
  5. 2026-10-13 Fix available: Red Hat AI Inference Server 3.5 · Red Hat
  6. 2026-10-13 CVSS score added · Red Hat
  7. 2026-10-14 Fix available: RHSA-2026:82368 · Red Hat
  8. 2026-10-14 Fix available: RHSA-2026:82415 · Red Hat
  9. 2026-10-14 Fix available: RHSA-2026:82371 · Red Hat
  10. 2026-10-16 Affected versions changed · Red Hat
  11. 2026-10-18 Affected versions changed · Red Hat
  12. 2026-10-20 Fix available: RHSA-2026:84785 · Red Hat
  13. 2026-10-20 Fix available: Red Hat Trusted Artifact Signer 1.4 · Red Hat
  14. 2026-10-22 Fix available: RHSA-2026:87124 · Red Hat
  15. 2026-10-22 Fix available: RHSA-2026:87120 · Red Hat
  16. 2026-10-22 Fix available: Red Hat Ansible Automation Platform 2.6, Red Hat Ansible Automation Platform 2.7 · Red Hat
  17. 2026-10-30 Fix available: RHSA-2026:92452 · Red Hat
  18. 2026-10-30 Fix available: RHSA-2026:92449 · Red Hat
  19. 2026-10-30 Fix available: Red Hat Enterprise Linux AI 3.5 · Red Hat
  20. 2026-10-30 Affected versions changed · Red Hat
  21. 2026-10-30 Fix available: Red Hat Satellite 6.18, Red Hat Satellite 6.19 · Red Hat
  22. 2026-10-31 Fix available: RHSA-2026:92583 · Red Hat
  23. 2026-10-31 Fix available: RHSA-2026:92666 · Red Hat
  24. 2026-10-31 Fix available: RHSA-2026:92667 · Red Hat
  25. 2026-11-01 Fix available: RHSA-2026:92566 · Red Hat
  26. 2026-11-03 Fix available: RHSA-2026:94500 · Red Hat
  27. 2026-11-03 Fix available: RHSA-2026:94501 · Red Hat
  28. 2026-11-03 Fix available: RHSA-2026:94523 · Red Hat
  29. 2026-11-03 Fix available: RHSA-2026:94557 · Red Hat
  30. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux AppStream E4S (v.9.4) +3 · Red Hat
  31. 2026-11-04 Fix available: RHSA-2026:94634 · Red Hat
  32. 2026-11-04 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux High Availability E4S (v.9.2), Red Hat Enterprise Linux Resilient Storage E4S (v.9.2) · Red Hat
  33. 2026-11-04 Fix available: RHSA-2026:95012 · Red Hat
  34. 2026-11-04 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · Red Hat
  35. 2026-11-05 Fix available: Red Hat Trusted Artifact Signer 1.5 · Red Hat
  36. 2026-11-06 Fix available: RHSA-2026:95261 · Red Hat
  37. 2026-11-06 Fix available: RHSA-2026:95267 · Red Hat

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-65301 PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation CVSS 3.1CRITICAL 9.1
  • TI-2026-65219 PyJWT: Unauthenticated RecursionError DoS in pre-verification payload parse… CVSS 3.1HIGH 7.5
  • TI-2026-65218 PyJWT: PyJWKClient still amplifies unauthenticated JWKS fetches on unknown kid values (incomplete fix of CVE-2026-48524) CVSS 3.1HIGH 7.5
  • TI-2026-25107 PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation) CVSS 3.1HIGH 7.5
  • TI-2026-65310 PyJWT accepts inconsistent OKP x/d JWKs, causing public/private key identity confusion CVSS 3.1HIGH 8.2
  • TI-2026-65307 PyJWT BOM Bypass CVSS 3.1HIGH 7.4
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences