Skip to main content
VulnerabilityPublished Updated

CVE-2026-11549: IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a virtual

Source GCVE Database

0
Compare
Authoritative record:CVE-2026-11549· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 2 Nov 2026, 22:58 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.16.5
EPSS
0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Sep 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 2 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
IBMWebSphere Application ServerAffected
  • =9.0
  • =8.5
Fixed in–
IBMWebSphere Application Server - LibertyAffected
  • >=17.0.0.3 <=26.0.0.5
Fixed in–

AI-suggested

Until an official fix is available, organizations should monitor IBM's security advisories for updates and consider implementing compensating controls if possible to restrict unauthorized access.

Description

IBM WebSphere Application Server and WebSphere Application Server Liberty contain a virtual host bypass vulnerability (CVE-2026-11549) that allows unauthorized access by circumventing virtual host restrictions. The vulnerability has a CVSS v3.1 base score of 6.5, indicating medium severity. No patch or remediation information is currently available, and no exploits are known to be active in the wild.

References

Community reviews

Loading reviews…