CVE-2026-119566
Medium
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.
SeverityMedium
CVSS4.8
Exploit probability—
Product
Prometheus
PublishedOct 30, 2026
First seenNov 4, 2026
Weakness typeCWE-522CWE-522
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| prometheus prometheus | v ≤ 3.15.1 | — |
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