Is CVE-2026-73100 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-73100 being exploited in the wild.

How severe is CVE-2026-73100?

Informational severity, published 5 November 2026.

Is there a fix for CVE-2026-73100?

Yes: fixed in 9.2.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-73100 attacked?

It is attacked over the network.

Am I affected by CVE-2026-73100?

Check whether you run Apache Juneau at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-73100: Apache Juneau sensitive information insertion in log file

CVE-2026-73100 · Severity: info · Published 2026-11-05

Apache Juneau is a REST framework library used to build web services. When a server error occurs, the default logger writes request headers—including Authorization, Cookie, and API keys—in plain text to application logs without redacting sensitive data. Anyone with access to the application logs can read these credentials, leading to account compromise and data breach.

Technologies: Apache Juneau. Vendors: Apache.

Quick answers

Is CVE-2026-73100 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-73100 being exploited in the wild.
How severe is CVE-2026-73100?: Informational severity, published 5 November 2026.
Which products and versions are affected?: Apache Juneau through 9.2.0.
Is there a fix for CVE-2026-73100?: Yes: fixed in 9.2.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-73100 attacked?: It is attacked over the network.
Am I affected by CVE-2026-73100?: Check whether you run Apache Juneau at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 9.2.1

Technical details

The REST server call logger in Apache Juneau fails to redact sensitive HTTP request headers (Authorization, Cookie, Proxy-Authorization, X-API-Key) when logging server errors. This is a cleartext information disclosure affecting the default logging behavior; no authentication or special network access is required—any client able to trigger a server error will cause credentials to be written to logs. The vulnerability is fixed in version 9.2.1.

Affected products

Apache Juneau through 9.2.0

Timeline

2026-11-05: disclosed

References

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