Apache Juneau: Sensitive request headers logged in cleartext by the default request logger on server errors
- Exploited
- No known exploitation
- Fix
- Fixed in 9.2.1
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 9.2.1.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 37/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Apache Juneau, a Java framework for building REST servers and clients, is affected: its default request logger writes sensitive request headers such as Authorization, Cookie, and X-API-Key to the application log in cleartext whenever a request ends in a server error. A remote attacker who can trigger a server error, without logging in or any user action, can obtain those credentials by reading the logs.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
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.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed per the CVSS vector, reachable over the network without a login · Unknown: No advisory context yet
- Reach10/20Affects Maven packages
- Severity10/10CVSS 10.0
- No patch0/5No signal
What would change the score
- Would score about 82 if added to CISA KEV
- Would score about 77 if CISA's SSVC rates exploitation active
- Would score about 42 if advisories confirm default setups are exposed
Impact
- Widely used
12 packages depend on org.apache.juneau:juneau-rest-server.Source: deps.dev
What to do
Upgrade to a fixed version: 9.2.1.
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
Affected versions
- org.apache.juneau:juneau-rest-serverMaven
fixed in 9.2.1
- org.apache.juneau:juneau-rest-commonMaven
fixed in 9.2.1
Evidence 1
- Advisory
Corrections
None so far.
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Questions about CVE-2026-73100
Is CVE-2026-73100 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-73100?
org.apache.juneau:juneau-rest-server (Maven): before 9.2.1. org.apache.juneau:juneau-rest-common (Maven): before 9.2.1.Source: cve.now feed data
How do I fix CVE-2026-73100?
Upgrade to a fixed version: 9.2.1.Source: cve.now feed data