Apache Juneau: REST client forwards credentials to a different origin when following HTTP redirects
- 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
The Apache Juneau REST client, which is a Java library, forwards credential headers such as Authorization, Cookie, and X-API-Key to a different host, port, or HTTP scheme when it follows a redirect. An attacker who can get a server to redirect the client can remotely capture these credentials without logging in and with no user action.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
Insufficiently Protected Credentials vulnerability in Apache Juneau.
The Apache Juneau RestClient followed HTTP redirects while keeping credential headers from the original request, so a server that redirected the client to a different host or port, or from HTTPS to HTTP, could receive headers such as Authorization, Cookie, Proxy-Authorization and X-API-Key.
This issue affects Apache Juneau: through 9.2.0.
Users are recommended to upgrade to version 9.2.1, which fixes the issue. The fix applies to HTTP clients created by the RestClient builder; applications that supply their own HttpClient must disable automatic redirects or strip credential headers on cross-origin redirects themselves.
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
11 packages depend on org.apache.juneau:juneau-rest-client.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-clientMaven
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-2026-73116
Is CVE-2026-73116 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-2026-73116?
org.apache.juneau:juneau-rest-client (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-2026-73116?
Upgrade to a fixed version: 9.2.1.Source: cve.now feed data