CVE-2026-5516

IBM WebSphere Application Server Liberty is affected by a security bypass vulnerability

At a glance

Severity: MEDIUM 4.4
EPSS: EPSS 0.21 % · percentile 12 (2026-10-27)
State: PUBLISHED
Published: 2026-05-27
Updated: 2026-06-02
Assigner: ibm
NVD status: Modified

Description

IBM WebSphere Application Server - Liberty 22.0.0.11 through 26.0.0.5 IBM WebSphere Application Server Liberty could allow a remote attacker to bypass security under limited conditions by exploiting a specific timing window.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 4.4	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N	ibm
CVSS 3.1	MEDIUM 4.4	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N	NVD · psirt@us.ibm.com (Secondary)
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-362

European references

ENISA EUVD · EUVD-2026-32487
GCVE · GCVE-0-2026-5516

CERT-FR advisories

CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1032 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:* ≥ 22.0.0.11 ≤ 26.0.0.5

Affected products

Product	Versions
IBM · WebSphere Application Server - Liberty	affected 22.0.0.11 ≤ 26.0.0.5

References

https://www.ibm.com/support/pages/node/7273425

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD