Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google
Affects prometheusSource GCVE Database
Not known to be exploited · CVSS 6.3 Medium : upgrade to 3.15.2 when convenient.
Data as of 30 Oct 2026, 13:36 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 6.3 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 4.8 |
| CNA | CVSS 4.0 | 6.3 |
- Patch
- Available – fixed in 3.15.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade prometheus/prometheus to 3.15.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubprometheus/prometheuspkg:github/prometheus/prometheusOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, avoid redirecting remote_write requests to untrusted hosts and restrict control over remote-write endpoints to trusted parties only.
Description
Prometheus versions up to 3.15.1 have a credential leak vulnerability that enables attackers to capture Azure AD or Google IAM bearer tokens. This occurs when remote_write requests are redirected to a malicious host, allowing token replay and unauthorized metric writes to the victim's backend.
References
- nvd.nist.gov/vuln/detail/CVE-2026-119566 (opens in a new tab)
- github.com/prometheus/common/pull/901 (opens in a new tab)
- abraxaslabs.tech/research/prometheus-bearer-redirect (opens in a new tab)
- github.com/prometheus/prometheus (opens in a new tab)
- github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go (opens in a new tab)
- github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go (opens in a new tab)
- vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects (opens in a new tab)