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CVE-2026-78636VulnerabilityPublished

IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.10 is affected by an information disclosure

Source GCVE Database

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Authoritative record:CVE-2026-78636· Medium 4.3

Not known to be exploited · CVSS 4.3 Medium.

Data as of 9 Nov 2026, 00:32 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–
Ibmibm/websphere_application_server_libertypkg:rpm/ibm/websphere_application_server_libertyOther threatsAffected
  • >=17.0.0.3 <=26.0.0.10
Fixed in–

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

AI-suggested

Until a patch is available, restrict access to the JMX REST connector and monitor for unusual activity related to this component.

Description

IBM WebSphere Application Server Liberty versions 17.0.0.3 through 26.0.0.10 contain an information disclosure vulnerability. This flaw arises from unsafe class reflection in the JMX REST connector body parser, potentially allowing unauthorized information exposure. The vulnerability has a medium severity rating with a CVSS score of 4.3.

References

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