CVE-2026-27465Network attack vector

Credential disclosure via unmasked configuration API response

Published Feb 26, 2026 · Updated Feb 26, 2026

Information disclosure in Fleet before 4.80.1 allows remote authenticated users to retrieve Google Calendar service account credentials. The configuration API serializes the Google Calendar api_key_json object into GET responses without masking its values, including private_key. An Observer role and a configured Google Calendar integration suffice; the exposed key enables access only to resources granted to that service account.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Fleet before 4.80.1 allows remote authenticated users to retrieve Google Calendar service account credentials. The configuration API serializes the Google Calendar api_key_json object into GET responses without masking its values, including private_key. An Observer role and a configured Google Calendar integration suffice; the exposed key enables access only to resources granted to that service account.

The record

CVE
CVE-2026-27465
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Fleet Device Management
Product
Fleet
Classifications
CWE-201, T1552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=< 4.80.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fleet Device Management · Fleetversion=< 4.80.1

Published CVSS scores

1.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-201Insertion of Sensitive Information Into Sent Data
T1552Unsecured Credentials

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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