CVE-2026-73100
Apache Juneau: Sensitive request headers logged in cleartext by the default request logger on server errors
What happened?
Insertion of Sensitive Information into Log File vulnerability in Apache Juneau.
The default REST server call logger records request headers for requests that end in a server error, without redacting them. Any client able to cause a server error gets headers such as Authorization, Cookie, Proxy-Authorization and X-API-Key written in cleartext to the application log, exposing them to anyone who can read the logs.
This issue affects Apache Juneau: through 9.2.0.
Users are recommended to upgrade to version 9.2.1, which fixes the issue.
Affected software and versions
| Software | Version information | Fixed version |
|---|---|---|
| org.apache.juneau:juneau-rest-serverApache Software Foundation | affected: 0 to < 9.2.1 | See vendor advisory |
| org.apache.juneau:juneau-rest-commonApache Software Foundation | affected: 0 to < 9.2.1 | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.