{"id":"CVE-2026-43638","title":"Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import","summary":"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 `collect…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-862"],"vendor":"bitwarden","product":"server","affected":["server < 2026.4.1"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-05-11T18:21:18.289415Z"},"exploitAvailable":true,"published":"2026-05-11","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:03:30.271Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43638","references":[{"url":"https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass"},{"url":"https://github.com/bitwarden/server/releases/tag/v2026.4.1","label":"server 2026.4.1 Release Notes"},{"url":"https://github.com/bitwarden/server/pull/7394"},{"url":"https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758"},{"url":"https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import"}],"tags":["cve.org","exploit-available"],"epss":0.00188,"epssPercentile":0.08493,"ingestedAt":"2026-11-08T14:51:22.428Z","slug":"CVE-2026-43638","body":"## Overview\n\nBitwarden 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.\n\n## Affected\n\n- `server < 2026.4.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}