{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"prometheus/prometheus","product":"prometheus","source":"CNA: VulnCheck","vendor":"prometheus","versions":[{"lessThanOrEqual":"3.15.1","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-119566","cwes":["CWE-522"],"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.","epss":{"date":"2026-11-04","percentile":0.10076,"score":0.00201},"exploits":[],"kev":null,"metrics":[{"score":6.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},{"score":6.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":4.8,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1793834240063,"publishedAt":1793359873086,"references":[{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go#L326-L333"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go#L205-L216"},{"source":"CNA: VulnCheck","tags":["related","patch","issue-tracking"],"url":"https://github.com/prometheus/common/pull/901"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://abraxaslabs.tech/research/prometheus-bearer-redirect"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/prometheus/prometheus"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://abraxaslabs.tech/research/prometheus-bearer-redirect"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/prometheus/common/pull/901"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/prometheus/prometheus"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go#L326-L333"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go#L205-L216"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/prometheus/common/pull/901"}],"revision":"e51f483cd89fd9cdbfe1045049343a533d1ea1a13655c0f5d1e997a29cbd9e87","sources":[{"modifiedAt":1793830814999,"name":"CNA: VulnCheck","retrievedAt":1793833731618,"url":"https://www.cve.org/CVERecord?id=CVE-2026-119566"},{"modifiedAt":1793834240063,"name":"NVD","retrievedAt":1793838186078,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119566"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793833760129,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-119566"}],"ssvc":{"assessedAt":1793830805346,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects","updatedAt":1793838186078}