Skip to content
Fencer Vulns
medium 5.9

CVE-2026-84185 json

Jwcrypto: jwcrypto: general json jws kid binding bypass during jwkset verification

published 2026-09-03 2 mo ago modified 2026-11-06 3 d ago also EUVD-2026-70747

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.

Patch / fix

  • python-jwcrypto SLES 16.0, SLES for SAP applications 16.0 1.5.6-160000.4.1

suse advisories SUSE-SU-2026:23702-1SUSE-SU-2026:23722-1

  • python-jwcrypto openSUSE Leap 16.0 1.5.6-160000.4.1
  • python-jwcrypto openSUSE Tumbleweed 1.6.0-1.1

opensuse advisories openSUSE-SU-2026:21827-1openSUSE-SU-2026:11712-1

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-2026-84185 updated cvss 5.9

jwcrypto: jwcrypto: General JSON JWS kid binding bypass during JWKSet verification

  • Red Hat Ansible Automation Platform 2 python3.11-jwcrypto, python3.12-jwcrypto, automation-controller 4.7.16-1.el9ap, ansible-automation-platform-25/gateway-rhel8, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-27/gateway-rhel9, +7 more Red Hat Enterprise Linux 7 python-jwcrypto Red Hat Enterprise Linux 8 python-jwcrypto, python3-jwcrypto Red Hat Enterprise Linux 9 python-jwcrypto, python3-jwcrypto Red Hat Enterprise Linux 10 python-jwcrypto
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-feature-server-rhel9, rhoai/odh-kserve-storage-initializer-rhel9 Red Hat OpenStack Platform 16.2 rhosp-rhel8/openstack-tempest, rhosp-rhel8/openstack-nova-api, rhosp-rhel8/openstack-novajoin-base, rhosp-rhel8/openstack-tripleoclient, rhosp-rhel8/openstack-novajoin-server, rhosp-rhel8/openstack-mistral-executor, +2 more
    not affected: vulnerable code not present

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
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

Affected products

  • Red Hat Red Hat Ansible Automation Platform 2
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenStack Platform 16.2

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

References

Sources

Fencer Vulns 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.