The Azure Key Vault KMS provider in Kroxylicious accepts an untrusted vaultName from wire-deserialized EDEK bytes without format validation, enabling SSRF that exfiltrates the proxy's Azure bearer token to an attacker-controlled host. Token replay against the real Key Vault defeats the entire record-encryption trust model.

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Fixes

Solution

No solution given by the vendor.


Workaround

1. Bind all topics to KEKs — remove PASSTHROUGH_UNENCRYPTED as unresolvedKeyPolicy. Explicitly configure kekSelector to match every topic. 2. Restrict outbound network access — use Kubernetes NetworkPolicy to limit proxy pod egress to only legitimate Azure Key Vault endpoints on port 443. 3. Monitor KMS call patterns — alert on unwrap requests targeting unexpected vault hostnames.

History

Tue, 20 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 20 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
Description The Azure Key Vault KMS provider in Kroxylicious accepts an untrusted vaultName from wire-deserialized EDEK bytes without format validation, enabling SSRF that exfiltrates the proxy's Azure bearer token to an attacker-controlled host. Token replay against the real Key Vault defeats the entire record-encryption trust model.
Title Kroxylicious-kms-provider-azure-key-vault-kms: streams for apache kafka kroxylicious: azure key vault ssrf exfiltrates bearer token via untrusted edek vaultname
First Time appeared Redhat
Redhat amq Streams
Weaknesses CWE-918
CPEs cpe:/a:redhat:amq_streams:3
Vendors & Products Redhat
Redhat amq Streams
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-20T13:40:36.464Z

Reserved: 2026-10-06T07:03:52.238Z

Link: CVE-2026-105941

cve-icon Vulnrichment

Updated: 2026-10-20T13:40:31.659Z

cve-icon NVD

Status : Received

Published: 2026-10-20T13:16:39.457

Modified: 2026-10-20T14:16:56.207

Link: CVE-2026-105941

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T14:15:14Z

Weaknesses