{"id":"UBUNTU-CVE-2026-42151","details":"Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the client_secret field in the Azure AD remote write OAuth configuration (storage/remote/azuread) was typed as string instead of Secret. Prometheus redacts fields of type Secret when serving the configuration via the /-/config HTTP API endpoint. Because the field was a plain string, the Azure OAuth client secret was exposed in plaintext to any user or process with access to that endpoint. This issue has been patched in versions 3.5.3 and 3.11.3.","modified":"2026-07-02T18:02:42.325552132Z","published":"2026-05-04T19:16:00Z","upstream":["CVE-2026-42151"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42151"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42151"}],"affected":[{"package":{"name":"prometheus","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.14.0+ds-1","0.16.2+ds-1","0.16.2+ds-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"prometheus","binary_version":"0.16.2+ds-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}},{"package":{"name":"prometheus","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.1+ds-1","1.8.1+ds-2","2.1.0+ds-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0+ds-1","binary_name":"prometheus"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}},{"package":{"name":"prometheus","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.1+ds-3","2.15.2+ds-2"],"ecosystem_specific":{"binaries":[{"binary_name":"prometheus","binary_version":"2.15.2+ds-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}},{"package":{"name":"prometheus","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.24.1+ds-1ubuntu1","2.24.1+ds-1ubuntu2","2.31.1+ds2-2","2.31.2+ds1-1","2.31.2+ds1-1ubuntu1","2.31.2+ds1-1ubuntu1.22.04.1","2.31.2+ds1-1ubuntu1.22.04.2","2.31.2+ds1-1ubuntu1.22.04.3","2.31.2+ds1-1ubuntu1.22.04.3+esm1","2.31.2+ds1-1ubuntu1.22.04.3+esm2","2.31.2+ds1-1ubuntu1.22.04.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"prometheus","binary_version":"2.31.2+ds1-1ubuntu1.22.04.3+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}},{"package":{"name":"prometheus","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.45.0+ds-3build1","2.45.1+ds-1","2.45.1+ds-2","2.45.1+ds-3","2.45.3+ds-2","2.45.3+ds-2build1","2.45.3+ds-2ubuntu0.1","2.45.3+ds-2ubuntu0.2","2.45.3+ds-2ubuntu0.2+esm1","2.45.3+ds-2ubuntu0.2+esm2","2.45.3+ds-2ubuntu0.3","2.45.3+ds-2ubuntu0.3+esm1","2.45.3+ds-2ubuntu0.3+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"prometheus","binary_version":"2.45.3+ds-2ubuntu0.3+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}},{"package":{"name":"prometheus","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.53.3+ds1-1","2.53.3+ds1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-prometheus-prometheus-dev","binary_version":"2.53.3+ds1-2"},{"binary_name":"prometheus","binary_version":"2.53.3+ds1-2"},{"binary_version":"2.53.3+ds1-2","binary_name":"promtool"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}},{"package":{"name":"prometheus","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/prometheus?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.53.3+ds1-2","2.53.5+ds1-2","2.53.5+ds1-3","2.53.5+ds1-3ubuntu0.26.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-prometheus-prometheus-dev","binary_version":"2.53.5+ds1-3ubuntu0.26.04.1~esm1"},{"binary_name":"prometheus","binary_version":"2.53.5+ds1-3ubuntu0.26.04.1~esm1"},{"binary_version":"2.53.5+ds1-3ubuntu0.26.04.1~esm1","binary_name":"promtool"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42151.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}