CVE-2026-19121
HIGHCVE-2026-19121 is a high-severity (CVSS 8.3) CWE-290 vulnerability. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
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…
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Description
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.
Detection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
The records we use list no fixed release for CVE-2026-19121. Check the upstream advisory for a patched version, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
Frequently Asked Questions
Is CVE-2026-19121 in your dependencies?
Find it across your dependency tree, including transitive dependencies.