{"id":"CVE-2026-119566","title":"Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects","summary":"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 endpoin…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-522"],"vendor":"prometheus","product":"prometheus","affected":["prometheus <= 3.15.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-04T22:20:05.346086Z"},"published":"2026-10-30","updated":"2026-11-04","sourceUpdated":"2026-11-04T22:20:14.999Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-119566","references":[{"url":"https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go#L326-L333"},{"url":"https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go#L205-L216"},{"url":"https://github.com/prometheus/common/pull/901"},{"url":"https://abraxaslabs.tech/research/prometheus-bearer-redirect"},{"url":"https://github.com/prometheus/prometheus"},{"url":"https://www.vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects","label":"VulnCheck Advisory: Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects"}],"tags":["cve.org"],"epss":0.00201,"epssPercentile":0.10076,"ingestedAt":"2026-11-03T11:43:15.775Z","slug":"CVE-2026-119566","body":"## Overview\n\nPrometheus 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.\n\n## Affected\n\n- `prometheus <= 3.15.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}