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CVE-2026-119566 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://abraxaslabs.tech/research/prometheus-bearer-redirect	[email protected]
https://github.com/prometheus/common/pull/901	[email protected]
https://github.com/prometheus/prometheus	[email protected]
https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go#L326-L333	[email protected]
https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go#L205-L216	[email protected]
https://www.vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-522	Insufficiently Protected Credentials	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	CVE Modified	CISA-ADP
Oct 30, 2026	New CVE Received	[email protected]