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VulnerabilityPublished

CVE-2026-78636: IBM WebSphere Application Server – Liberty · Reflection Injection

Affects IBM WebSphere Application Server – LibertySource CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium.

Data as of 8 Nov 2026, 18:49 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.14.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 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 8 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
IBMWebSphere Application Server - LibertyAffected
  • >=17.0.0.3 <=26.0.0.10
Fixed in–

CPE configurations (2)

  • cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.10:*:*:*:*:*:*:*

AI-suggested

Users should monitor IBM advisories for updates and apply patches once available.

Description

IBM WebSphere Application Server Liberty versions 17.0.0.3 through 26.0.0.10 contain an information disclosure vulnerability caused by unsafe class reflection in the JMX REST connector body parser. This flaw could allow an attacker with low privileges to gain limited information disclosure without user interaction. The vulnerability has a medium severity rating with a CVSS score of 4.3.

References

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