CVE-2026-88132Network attack vectorHinoki check available

Unauthenticated network information disclosure

Published Oct 13, 2026 · Updated Oct 13, 2026

Origin validation failure in Microsoft Azure Key Vault Client SDK allows remote attackers to disclose information over a network. The CNA record does not identify the failing operation or exposed data, and upstream challenge-cache fixes are not explicitly linked to this CVE. No attacker credentials or user interaction are required; the affected package bounds include inconsistent intervals that do not establish reliable version coverage.

CVSS severityUnavailable
Unscored
EPSS probability0.32%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Origin validation failure in Microsoft Azure Key Vault Client SDK allows remote attackers to disclose information over a network. The CNA record does not identify the failing operation or exposed data, and upstream challenge-cache fixes are not explicitly linked to this CVE. No attacker credentials or user interaction are required; the affected package bounds include inconsistent intervals that do not establish reliable version coverage.

The record

CVE
CVE-2026-88132
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Microsoft Corporation
Product
azure-keyvault-certificates
Classifications
CWE-346
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.11.2 <4.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft Corporation · azure-keyvault-certificatesversion=4.11.2 <4.9.2
Microsoft Corporation · azure-keyvault-keysversion=4.11.2 <4.10.2
Microsoft Corporation · azure-keyvault-administrationversion=4.7.1 <4.8.2
Microsoft Corporation · azure-keyvault-secrets<4.11.2
Microsoft Corporation · Azure Key Vault Client SDKversion=-

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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