# CVE-2026-17358: Multiple Vulnerabilities in IBM API Connect

Status: published. Published: 2026-11-07. Updated: 2026-11-07.

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to bypass authentication across tenants due to improper authentication. Authentication checks are not sufficiently isolated between tenants, which could allow a user from one tenant to be accepted by another.

## Remediation

- fix: IBM strongly recommends addressing the vulnerability now by upgrading to v12.1.1.3
Fix Central Link:  https://www.ibm.com/support/pages/node/7290205 



IBM strongly recommends addressing the vulnerability now by upgrading to 10.0.8.13Fix Central Link: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm%7EWebSphere&product=ibm/WebSphere/IBM+API+Connect&release=10.0.8.12&platform=All&function=all (source: CNA: ibm)
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: ibm) — https://www.ibm.com/support/pages/node/7295635
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: ibm) — https://www.ibm.com/support/pages/node/7295637

## Affected products and versions

- IBM / API Connect: ≥ 12.1.0.0; ≤ 12.1.1.2 (affected, semver); ≥ 10.0.8.0; ≤ 10.0.8.12 (affected, semver). Source: CNA: ibm

## Severity and prioritization

- CVSS 3.1: 8.2 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N; source: CNA: ibm

- CVSS 3.1: 8.2 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N; source: NVD: psirt@us.ibm.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-287

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.ibm.com/support/pages/node/7295635 (CNA: ibm; vendor-advisory, patch)

- https://www.ibm.com/support/pages/node/7295637 (CNA: ibm; vendor-advisory, patch)

- https://www.ibm.com/support/pages/node/7295635 (psirt@us.ibm.com)

- https://www.ibm.com/support/pages/node/7295637 (psirt@us.ibm.com)

## Provenance

- CNA: ibm: https://www.cve.org/CVERecord?id=CVE-2026-17358; retrieved 2026-11-07; source updated 2026-11-07

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-17358; retrieved 2026-11-07; source updated 2026-11-07

Revision: b4f2fdb5c277e78b4c040c528d69b1cf5595bebae348604ade6d01be0990d987

Canonical: https://y2.dev/cve/CVE-2026-17358

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