Vulnerability/
https://seclists.org/oss-sec/2026/q4/551

https://seclists.org/oss-sec/2026/q4/551: CVE-2026-76171: Apache James: SSRF filter bypass in the JMAP PushSubscription web-push client

Q: Which deployments are affected?

Apache James 3.9.0 deployments are affected if they use the JMAP PushSubscription web-push client. Version 3.9.1 includes the fix.

Q: What could an attacker do by exploiting this issue?

Improper validation in the JMAP webPush SSRF checks can allow requests to reach internal addresses. The provided information does not specify authentication requirements or the exact internal services that may be reachable.

Q: What should teams do if they are running an affected version?

Upgrade Apache James to version 3.9.1. No alternative mitigation or configuration workaround is provided in the available advisory.

Published Nov 6, 2026

Updated

Affected Software

1 affected component

Apache James>=3.9.0<3.9.1

Frequently Asked Questions

Which deployments are affected?

Apache James 3.9.0 deployments are affected if they use the JMAP PushSubscription web-push client. Version 3.9.1 includes the fix.

What could an attacker do by exploiting this issue?

Improper validation in the JMAP webPush SSRF checks can allow requests to reach internal addresses. The provided information does not specify authentication requirements or the exact internal services that may be reachable.

What should teams do if they are running an affected version?

Upgrade Apache James to version 3.9.1. No alternative mitigation or configuration workaround is provided in the available advisory.

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