What’s Vulnerable › Vulnerabilities
CVE-2025-11915: HTTP Desynchronisation in Vertex AI for certain third-party models
- Severity: medium (CVSS 6.9 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-10-22 · updated 2026-10-18
- Weakness: CWE-444
Description
Connection desynchronization between an HTTP proxy and the model backend. The fixes were rolled out for all proxies in front of impacted models by 2025-09-28. Users do not need to take any action.
Affected products
- Google Cloud Vertex AI: Open Models for MaaS: before 2025-09-28 — fixed in 2025-09-28
- Google Cloud Vertex AI: Partner Models for MaaS: before 2025-09-26 — fixed in 2025-09-26
- Google Cloud Vertex AI: Self-Deployed Models: before 2025-09-28 — fixed in 2025-09-28
How to fix
Upgrade to a fixed version: Google Cloud Vertex AI: Open Models for MaaS 2025-09-28; Google Cloud Vertex AI: Partner Models for MaaS 2025-09-26; Google Cloud Vertex AI: Self-Deployed Models 2025-09-28. Check the vendor advisory for mitigations.
References
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