CVE-2026-43638CWE-862

Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

Medium · published May 11, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
24.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
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
EPSS
0.00325 · 24.4th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-05-11T17:13Z
EPSS history
Timeline
  • 11 MAY 17:13Z
    Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import
    cvelistv5