{"schemaVersion":3,"id":"CVE-2026-33343","aliases":["UBUNTU-CVE-2026-33343","DEBIAN-CVE-2026-33343","CGA-23q3-xh45-2fg8","CGA-6g2f-gq3m-8mpr","CGA-6j46-hf26-8x8h","CGA-86gf-vhfc-8cx5","CGA-9vq6-28c5-8985","CGA-9wgx-2hrc-v7m3","CGA-c7h2-rr2r-jjvc","CGA-cqqc-3cg9-46vg","CGA-j89v-98hg-254p","CGA-p73m-g7m4-8gpx","CGA-r3w5-r83j-83ww","CGA-x3mh-v45c-6rh6","GHSA-rfx7-8w68-q57q","BIT-etcd-2026-33343","GO-2026-4808","CGA-2vp5-9m7q-j96m","CGA-85pm-pgcm-9q22","CGA-chrh-84jp-vp9r","CGA-xmj3-f2v7-mjp3"],"status":"published","duplicateOf":null,"title":null,"description":"etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, an authenticated user with RBAC restricted permissions on key ranges can use nested transactions to bypass all key-level authorization. This allows any authenticated user with direct access to etcd to effectively ignore all key range restrictions, accessing the entire etcd data store. Kubernetes does not rely on etcd’s built-in authentication and authorization. Instead, the API server handles authentication and authorization itself, so typical Kubernetes deployments are not affected. Versions 3.4.42, 3.5.28, and 3.6.9 contain a patch. If upgrading is not immediately possible, reduce exposure by treating the affected RPCs as unauthenticated in practice. Restrict network access to etcd server ports so only trusted components can connect and require strong client identity at the transport layer, such as mTLS with tightly scoped client certificate distribution.","dates":{"published":"2026-03-26T13:23:48.247Z","modified":"2026-03-26T18:25:09.851Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":0,"severity":"unknown","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Wolfi","score":0,"severity":"unknown","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","exploitability":10,"impact":0,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":0,"severity":"unknown","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","exploitability":10,"impact":0,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":0,"severity":"unknown","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","exploitability":10,"impact":0,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00256,"percentile":0.16248,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.046000000000000034,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.0021},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00256,"percentile":0.16248}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0021,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00256,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00256,"percentile":0.16248}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-863","name":"Incorrect Authorization","description":"The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/863.html"}],"affected":[{"vendor":"chainguard","product":"etcd-3.4","name":"etcd-3.4","label":"etcd-3.4","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/etcd-3.4","purlType":"apk","versions":[{"text":"< 3.4.45-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.4.45-r0","eol":null,"hubHref":null},{"vendor":"chainguard","product":"juicefs-1.2","name":"juicefs-1.2","label":"juicefs-1.2","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/juicefs-1.2","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"juicefs-1.3","name":"juicefs-1.3","label":"juicefs-1.3","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/juicefs-1.3","purlType":"apk","versions":[{"text":"< 1.3.1-r22","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.3.1-r22","eol":null,"hubHref":null},{"vendor":"chainguard","product":"py3-etcd","name":"py3-etcd","label":"py3-etcd","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/py3-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"py3.10-etcd","name":"py3.10-etcd","label":"py3.10-etcd","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/py3.10-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"py3.11-etcd","name":"py3.11-etcd","label":"py3.11-etcd","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/py3.11-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"py3.12-etcd","name":"py3.12-etcd","label":"py3.12-etcd","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/py3.12-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"py3.13-etcd","name":"py3.13-etcd","label":"py3.13-etcd","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/py3.13-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"juicefs-1.3","name":"juicefs-1.3","label":"juicefs-1.3","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/juicefs-1.3","purlType":"apk","versions":[{"text":"< 1.3.1-r22","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.3.1-r22","eol":null,"hubHref":null},{"vendor":"wolfi","product":"py3-etcd","name":"py3-etcd","label":"py3-etcd","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/py3-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"py3.10-etcd","name":"py3.10-etcd","label":"py3.10-etcd","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/py3.10-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"py3.11-etcd","name":"py3.11-etcd","label":"py3.11-etcd","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/py3.11-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"py3.12-etcd","name":"py3.12-etcd","label":"py3.12-etcd","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/py3.12-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"py3.13-etcd","name":"py3.13-etcd","label":"py3.13-etcd","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/py3.13-etcd","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"debian","product":"etcd","name":"etcd","label":"etcd","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/etcd","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 3.5.16-11","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 3.5.16-11","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"etcd","name":"etcd","label":"etcd","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/etcd","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"etcd-io","product":"etcd","name":"etcd","label":"etcd","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 3.5.0-alpha.0, < 3.5.28","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.6.0-alpha.0, < 3.6.9","noFixRecorded":false,"fixedIn":null},{"text":"< 3.4.42","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.5.0-alpha.0, < 3.5.28 | ≥ 3.6.0-alpha.0, < 3.6.9 | < 3.4.42","eol":null,"hubHref":"/vendor/etcd-io/etcd"},{"vendor":"etcd","product":"etcd","name":"etcd","label":"etcd","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.4.42","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.5.0, < 3.5.28","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.6.0, < 3.6.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.4.42 | ≥ 3.5.0, < 3.5.28 | ≥ 3.6.0, < 3.6.9","eol":null,"hubHref":"/vendor/etcd/etcd"},{"vendor":"go.etcd.io","product":"etcd","name":"go.etcd.io/etcd","label":"etcd","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/go.etcd.io/etcd","purlType":"golang","versions":[{"text":"≤ 3.3.27","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"≤ 3.3.27 | All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"go.etcd.io/etcd","product":"v3","name":"go.etcd.io/etcd/v3","label":"v3","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/go.etcd.io/etcd/v3","purlType":"golang","versions":[{"text":"≥ 3.5.0-alpha.0, < 3.5.28","noFixRecorded":false,"fixedIn":null},{"text":"< 3.4.42","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.6.0-alpha.0, < 3.6.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.5.0-alpha.0, < 3.5.28 | < 3.4.42 | ≥ 3.6.0-alpha.0, < 3.6.9","eol":null,"hubHref":null}],"affectedCount":20,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/etcd-io/etcd/security/advisories/GHSA-rfx7-8w68-q57q","label":"github.com/etcd-io/etcd/security/advisories/GHSA-rfx7-8w68-q57q","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT","Advisory","WEB","Mitigation","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-33343","label":"ubuntu.com/security/CVE-2026-33343","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33343","label":"www.cve.org/CVERecord?id=CVE-2026-33343","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-33343","label":"security-tracker.debian.org/tracker/CVE-2026-33343","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33343.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33343.json","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33343","label":"nvd.nist.gov/vuln/detail/CVE-2026-33343","hostname":"nvd.nist.gov","tags":["Advisory","Oval"]},{"url":"https://github.com/etcd-io/etcd","label":"github.com/etcd-io/etcd","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21483-1"],"duplicates":[],"related":["CGA-MC2M-WGHC-M2WQ","OPENSUSE-SU-2026:21483-1"]},"timeline":[{"kind":"published","date":"2026-03-26T13:23:48.247Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-03-26T18:25:09.851Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T13:11:10.723Z","stale":false,"partial":false}}