Vulnerability · Published Oct 13, 2026 · Assigned by ibm

CVE-2026-77816IBM WebSphere Application Server Liberty Improper Certificate Validation

Medium 6.5

In plain English

A medium-severity improper certificate validation in WebSphere Application Server - Liberty from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 86.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.9 administrative client could allow man-in-the-middle attacks. An attacker could exploit this vulnerability to obtain sensitive information.

Affected products (as reported)

Vendor	Product	Versions
IBM	WebSphere Application Server - Liberty	17.0.0.3 – through 26.0.0.9

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

References

https://www.ibm.com/support/pages/node/7291394 vendor-advisory, patch