Vulnerability record
CVE-2026-19121
The short answer
CVE-2026-19121 affects IBM API Connect and is rated high (CVSS 8.3). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 0.37%.
What it is
IBM API Connect 12.1.0.0 through 12.1.1.2 could allow an authenticated attacker to gain unauthorized access due to improper authorization. Tenant context is not sufficiently verified against the authenticated user, which could allow access to another tenant's resources.
Weakness: CWE-290.
Severity
8.3 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
0.37%
Higher than 32% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- Low
Affected products
API Connect. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-19121 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-12. FIRST's EPSS estimates a 0.37% chance of exploitation in the next 30 days.
How do I fix CVE-2026-19121?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Undergoing Analysis. The description is NVD's text, quoted as published.
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