{"id":"CVE-2026-43638","aliases":["EUVD-2026-29130","GHSA-vvm4-hc77-cqmc"],"status":"published","title":"Bitwarden Server \u003c 2026.4.1 Missing Authorization via Organization Cipher Import","description":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00188,"percentile":0.08516,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2026-05-11T17:13:31Z","modified":"2026-11-09T02:47:16Z","products":[{"vendor":"bitwarden","product":"server"},{"vendor":"devolutions","product":"server"}],"references":[{"url":"https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass","tags":["technical-description","exploit","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/bitwarden/server/releases/tag/v2026.4.1","tags":["release-notes","Release Notes","advisory"]},{"url":"https://github.com/bitwarden/server/pull/7394","tags":["issue-tracking","patch","Issue Tracking","Patch","fix"]},{"url":"https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758","tags":["patch","Patch","fix"]},{"url":"https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import","tags":["third-party-advisory","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43638","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vvm4-hc77-cqmc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43638.json","tags":["advisory"]},{"url":"https://github.com/bitwarden/server","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-43638","title":"Bitwarden Server \u003c 2026.4.1 Missing Authorization via Organization Cipher Import","description":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.","status":"published","published":"2026-05-11T17:13:31.801Z","modified":"2026-11-08T14:03:30.271Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-29130","description":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.","status":"published","published":"2026-05-11T17:13:31Z","modified":"2026-11-08T14:03:30Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-08T15:13:08.77824Z"}],"ghsa":[{"id":"GHSA-vvm4-hc77-cqmc","title":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows...","description":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.","status":"published","published":"2026-05-11T18:31:46Z","modified":"2026-05-11T18:31:59Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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","level":"medium"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:07:59.393178Z"}],"nvd":[{"id":"CVE-2026-43638","description":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.","status":"published","published":"2026-05-11T18:16:36.823Z","modified":"2026-10-26T18:10:00.173Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:12:18.239974Z"}],"osv":[{"id":"CVE-2026-43638","title":"Bitwarden Server \u003c 2026.4.1 Missing Authorization via Organization Cipher Import","description":"Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.","status":"published","published":"2026-05-11T17:13:31.801Z","modified":"2026-11-09T02:47:16.086427954Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-09T03:16:24.800471Z"}]}}