# CVE-2026-12109: IBM Security Verify Access stack buffer overflow

Source: https://junglewise.ai/threats/cve-2026-12109-ibm-security-verify-access-10-0-through-10-0-9-2-and-ibm-verify  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-08. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-12109 · Severity: medium · CVSS 5.5 · Published 2026-10-08

IBM Security Verify Access is an identity and access management platform used to authenticate and authorize users to corporate applications. An administrator with access to the local management interface can exploit an unbounded stack buffer write to execute arbitrary code on the system, potentially compromising sensitive authentication infrastructure and user data.

Technologies: [IBM Security Verify Access](https://junglewise.ai/threats/technologies/security-verify-access), [IBM Security Verify Access Container](https://junglewise.ai/threats/technologies/security-verify-access-container), [IBM Verify Identity Access](https://junglewise.ai/threats/technologies/verify-identity-access), [IBM Verify Identity Access Container](https://junglewise.ai/threats/technologies/verify-identity-access-container). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-12109 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12109 being exploited in the wild.

**How severe is CVE-2026-12109?** Medium severity, with a CVSS score of 5.5, published 8 October 2026.

**Which products and versions are affected?** IBM Security Verify Access 10.0 through 10.0.9.2; IBM Verify Identity Access 11.0 through 11.0.3.

**Is there a fix for CVE-2026-12109?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-12109 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-12109?** Check whether you run IBM Security Verify Access, IBM Security Verify Access Container, IBM Verify Identity Access or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An out-of-bounds write vulnerability (CWE-787) exists in Security Verify Access and Verify Identity Access due to insufficient bounds checking on stack buffer operations. The vulnerability requires administrative privileges and local management interface access, but allows arbitrary code execution via unbounded writes to a fixed-size stack buffer.

## Affected products

- IBM Security Verify Access 10.0 through 10.0.9.2
- IBM Verify Identity Access 11.0 through 11.0.3

## Timeline

- 2026-10-08: disclosed

## References

- [https://www.ibm.com/support/pages/node/7291628](https://www.ibm.com/support/pages/node/7291628)

## Related threats

- [IBM Verify Identity Access and Security Verify Access hard-coded credentials privilege escalation](https://junglewise.ai/threats/cve-2026-109126-ibm-verify-identity-access-11-0-3-1-and-ibm-security-verify)
- [IBM Security Verify Access cross-site scripting in Web UI](https://junglewise.ai/threats/cve-2026-78407-ibm-security-verify-access-10-0-through-10-0-9-2-and-ibm-verify)
- [IBM Security Verify Access deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-78406-ibm-security-verify-access-10-0-through-10-0-9-2-and-ibm-verify)
- [IBM Security Verify Access deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-78401-ibm-security-verify-access-10-0-through-10-0-9-2-and-ibm-verify)
- [IBM Security Verify Access and Verify Identity Access denial of service](https://junglewise.ai/threats/cve-2026-78399-ibm-security-verify-access-10-0-through-10-0-9-2-and-ibm-verify)