# CVE-2025-11915: HTTP Desynchronisation in Vertex AI for certain third-party models

> CVE-2025-11915: HTTP Desynchronisation in Vertex AI for certain third-party models. CVSS 6.9 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2025-11915
Last updated: 2026-10-18T21:10:00Z

- Published: 2025-10-22 09:13 UTC · Updated: 2026-10-18 21:10 UTC · Assigner: GoogleCloud
- CVSS: 6.9 (CVSS 4.0) · Severity: Medium
- EPSS: 0.32%, 25th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: 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 vendors and products

- Google Cloud: Vertex AI: Open Models for MaaS
- Google Cloud: Vertex AI: Partner Models for MaaS
- Google Cloud: Vertex AI: Self-Deployed Models

## Tracked companies

- [Google Cloud](https://rewindex.com/company/google-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-11915)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-11915)
- [https://cloud.google.com/vertex-ai/generative-ai/docs/security-bulletins\#gcp-2025-059](https://cloud.google.com/vertex-ai/generative-ai/docs/security-bulletins#gcp-2025-059)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-11915 · Markdown: https://rewindex.com/cve/CVE-2025-11915.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-11915 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:48.709Z