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VulnerabilityPublished

CVE-2026-73095: Apache Juneau · Unthrottled Resource Allocation

Affects Apache JuneauSource CVE Database V5

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Not known to be exploited · CVSS 8.7 High : upgrade to 9.2.1 soon.

Data as of 5 Nov 2026, 12:04 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (apache)CVSS 4.08.7
Patch
Available – fixed in 9.2.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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-marshall and org.apache.juneau/juneau-rest-server to 9.2.1.

Affected software

ProductAffectedFixed in
Apache Juneauorg.apache.juneau:juneau-marshallAffected
  • <9.2.1
Fixed in
  • 9.2.1
Apache Juneauorg.apache.juneau:juneau-rest-serverAffected
  • <9.2.1
Fixed in
  • 9.2.1
Mavenorg.apache.juneau/juneau-marshallpkg:maven/org.apache.juneau/juneau-marshallOther threatsAffected
  • <9.2.1
Fixed in
  • 9.2.1
Mavenorg.apache.juneau/juneau-rest-serverpkg:maven/org.apache.juneau/juneau-rest-serverOther 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

Users should upgrade Apache Juneau to version 9.2.1 or later, where the issue is fixed. No other mitigation or temporary workaround is indicated.

Description

CVE-2026-73095 is a high-severity vulnerability in Apache Juneau through version 9.2.0. It involves allocation of resources without limits or throttling in the MessagePack parser enabled by default in the REST server. An unauthenticated client can trigger multi-gigabyte memory allocations causing an OutOfMemoryError and denial of service. Related unbounded allocations in multipart uploads and request reader buffers are also addressed. The issue is fixed in version 9.2.1.

References

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