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VulnerabilityPublished

CVE-2026-73116: Apache Juneau · Insufficiently Protected Credentials Vulnerability

Source GCVE Database

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Authoritative record:CVE-2026-73116· Critical 10.0

Not known to be exploited · CVSS 10.0 Critical : upgrade to 9.2.1 as a priority.

Data as of 5 Nov 2026, 13:06 UTC

CVSS 4.0 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (apache)CVSS 4.010.0
Patch
Available – fixed in 9.2.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade Apache Juneau and org.apache.juneau/juneau-rest-client and org.apache.juneau/juneau-rest-common to 9.2.1.

Affected software

ProductAffectedFixed in
Apache Juneauorg.apache.juneau:juneau-rest-clientAffected
  • <9.2.1
Fixed in
  • 9.2.1
Apache Juneauorg.apache.juneau:juneau-rest-commonAffected
  • <9.2.1
Fixed in
  • 9.2.1
Mavenorg.apache.juneau/juneau-rest-clientpkg:maven/org.apache.juneau/juneau-rest-clientOther threatsAffected
  • <9.2.1
Fixed in
  • 9.2.1
Mavenorg.apache.juneau/juneau-rest-commonpkg:maven/org.apache.juneau/juneau-rest-commonOther threatsAffected
  • <9.2.1
Fixed in
  • 9.2.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Apache Juneau to version 9.2.1 or later, where the vulnerability is fixed. For applications using custom HttpClients, disable automatic redirects or implement logic to strip credential headers on cross-origin redirects to prevent credential leakage.

Description

Apache Juneau versions through 9.2.0 have an Insufficiently Protected Credentials vulnerability in the RestClient component. The RestClient followed HTTP redirects while retaining credential headers such as Authorization, Cookie, Proxy-Authorization, and X-API-Key from the original request. This behavior could expose sensitive credentials to unintended hosts or downgrade from HTTPS to HTTP, risking credential leakage. The issue is fixed in version 9.2.1 by changing the handling of redirects and credential headers.

References

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