PT-2026-39662 · Bitwarden · Server

Sanjok Karki · Published 2026-05-11 · Updated 2026-05-11 · CVE-2026-43638

NVD

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-43638

Affected Products

Server

References · 6

• 🔥 https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-43638 · Security Note
• https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 · Patch
• https://github.com/bitwarden/server/pull/7394 · Note
• https://vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import · Note
• https://github.com/bitwarden/server/releases/tag/v2026.4.1 · Note