IBM API Connect: Improper authentication vulnerability (CVE-2026-16720)
IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to improper authentication, which could allow a remote attacker to obtain valid access tokens for other users.
CVE search metadata
CVE search record: CVE-2026-16720. Severity: critical. CVSS: 9.8. KEV: no. Product: API Connect (10.0.8.0 through 10.0.8.12), API Connect (12.1.0.0 through 12.1.1.2). Brief: IBM API Connect: Improper authentication vulnerability (CVE-2026-16720). Brief link: https://feed.craftedsignal.io/briefs/2026-11-ibm-api-connect-auth-bypass/
Triage facts
Revision 1- Applicability
- API Connect (10.0.8.0 through 10.0.8.12), API Connect (12.1.0.0 through 12.1.1.2)
- Evidence
- Unknown
- Severity
- Critical
- Sources
- 1 public source
- Freshness
- Revision 1Nov 7, 05:49 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 contain an improper authentication vulnerability. Authentication against a connected directory service is not sufficiently enforced, which could allow a remote attacker to assume another user's identity by obtaining valid access tokens. The CVSS v3.1 base score for this vulnerability is 9.8.