Full Report
Broadcom VMware security advisory (AV26-419)
Analysis Summary
# Vulnerability: Tanzu Jammy Stemcell Improper Certificate Validation
## CVE Details
- **CVE ID:** CVE-2026-341431
- **CVSS Score:** 7.5 (High) *(Estimated based on typical "Improper Certificate Validation" impacts)*
- **CWE:** CWE-295: Improper Certificate Validation
## Affected Systems
- **Products:** VMware Tanzu Jammy Stemcell
- **Versions:** All versions prior to 1.1193
- **Configurations:** Systems utilizing Tanzu Jammy Stemcells for cloud-native deployments where encrypted communications (TLS) are enforced.
## Vulnerability Description
A vulnerability exists in Tanzu Jammy Stemcells where the system fails to properly validate SSL/TLS certificates. This flaw typically occurs when the software does not correctly verify the identity of the server it is communicating with, allowing for the acceptance of expired, self-signed, or otherwise invalid certificates.
## Exploitation
- **Status:** No reports of exploitation in the wild; no public PoC currently listed.
- **Complexity:** Medium
- **Attack Vector:** Network (specifically through Man-in-the-Middle - MitM)
## Impact
- **Confidentiality:** High (Ability to intercept sensitive encrypted data)
- **Integrity:** High (Ability to modify data in transit)
- **Availability:** Low
## Remediation
### Patches
Broadcom has released updated stemcell versions to address this flaw. Administrators should upgrade to the following version or later:
- **Tanzu Jammy Stemcell:** 1.1193
### Workarounds
There are no official workarounds that provide equivalent protection to patching. Ensure that internal network traffic is monitored and that any automated certificate validation overrides in custom code are disabled.
## Detection
- **Indicators of Compromise:** Unusual certificate errors in system logs or evidence of unauthorized access to encrypted data streams.
- **Detection Methods and Tools:** Use network security monitoring (NSM) tools to inspect for Man-in-the-Middle (MitM) activity and verify the integrity of certificate chains established by the Stemcells.
## References
- Broadcom Support Content: hxxps[://]support[.]broadcom[.]com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37431
- Primary Security Advisory List: hxxps[://]support[.]broadcom[.]com/web/ecx/security-advisory?segment=VA
- Canadian Centre for Cyber Security (AV26-419) hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/broadcom-vmware-security-advisory-av26-419