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CVE-2025-11915

HTTP Desynchronisation in Vertex AI for certain third-party models

MEDIUM
6.9
CVSS Score
Published: October 22, 2025 at 09:13 AM UTC
Updated: October 18, 2026 at 09:10 PM UTC
1 product affected across 1 vendorVertex AI

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Severity
MEDIUM6.9
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vertex AI· Google Cloud
90%
0 ≤ v < 2025-09-260 ≤ v < 2025-09-280
Affected range stops below 2025-09-26, so it looks safe — our inference, not a vendor statement
Affected range stops below 2025-09-28, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://cloud.google.com/vertex-ai/generative-ai/docs/security-bulletins#gcp-2025-059

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.9MEDIUMGoogleCloud
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-444

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