IBM API Connect: Unauthorized access via improper authentication (CVE-2026-17278)
IBM API Connect versions 12.1.0.0 through 12.1.1.2 contain an improper authentication vulnerability that allows a remote attacker to impersonate a trusted party and access sensitive API catalog and runtime configuration data.
CVE search metadata
CVE search record: CVE-2026-17278. Severity: critical. CVSS: 9.8. KEV: no. Product: API Connect (12.1.0.0 through 12.1.1.2). Brief: IBM API Connect: Unauthorized access via improper authentication (CVE-2026-17278). Brief link: https://feed.craftedsignal.io/briefs/2026-11-ibm-api-connect-auth-bypass-074a2eb3/
Triage facts
Revision 1- Applicability
- API Connect (12.1.0.0 through 12.1.1.2)
- Evidence
- Unknown
- Severity
- Critical
- Sources
- 1 public source
- Freshness
- Revision 1Nov 7, 05:51 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
IBM API Connect versions 12.1.0.0 through 12.1.1.2 are affected by a vulnerability (CVE-2026-17278) due to improper authentication. Information supplied by the client is not sufficiently verified, which could allow a remote attacker to appear as a trusted party and gain unauthorized access to sensitive API catalog and runtime configuration data.