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Vulnerabilities/CVE-2026-119566Public Intelligence Dossier
Source: Microsoft · Limited verification•Last verified: •Collection Degraded
CVE-2026-119566Unknown / EvaluatingModerate (raw)CVSS 4.8CWE-522

Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects

Published: 05 Nov 2026•Last updated: 05 Nov 2026, 08:26 PM IST•Source identifier: disclosure@vulncheck.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
4.8Moderate (raw)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Metric sourceMicrosoft MSRC CVRF
EPSS probability
0.2%0.002
Percentile10th
Weakness type
CWE-522
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.

SOC priority

Medium

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; Source severity; no confirmed exploitation signal

Affected Products & Remediation

2 source-backed products
Affected products and versions (source)
  • azl3 telegraf 1.31.0-35 on Azure Linux 3.0 · version range not provided by source · Microsoft MSRC · Source
  • azl3 telegraf 1.31.0-36 on Azure Linux 3.0 · version range not provided by source · Microsoft MSRC · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • Microsoft MSRC: Release Notes

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched credential-exposure (CWE-522); network-unauthenticated (CVSS AV:N, CVSS PR:N, CVSS UI:N)

Exposure

  1. Identify affected installations and the credential-handling feature described by the source.Telemetry: Application inventory · The CWE alone does not establish which secrets were exposed. · Rule credential-exposure
  2. Identify devices reporting this CVE and note which expose the affected service to untrusted networks.Telemetry: DeviceTvmSoftwareVulnerabilities · A network-reachable, no-privilege vector makes internet-facing instances the first exposure question. · Rule network-unauthenticated

Exploitation evidence

  1. Review anomalous sign-ins for accounts that could be affected after confirming the exposure path.Telemetry: SigninLogs · Sign-in review is conditional; no compromise is presumed. · Rule credential-exposure
Show more (2)

Exploitation evidence

  1. Review inbound connections to the affected service from unexpected sources since the advisory date.Telemetry: DeviceNetworkEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule network-unauthenticated

Response

  1. Follow the source mitigation and rotate credentials only where exposure is confirmed or advised.Telemetry: Identity audit logs · Credential response should follow evidence and vendor guidance. · Rule credential-exposure

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
disclosure@vulncheck.com
Record status · verification
UPDATED · NVD API
CPE
Unknown

Evidence & Provenance

3 public sources
api.msrc.microsoft.comSource recordnvd.nist.govSource recordabraxaslabs.techSource record
Detection Hunting Query

— No published hunting query names this record. Browse community and library queries instead.

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.