CVE-2026-43638

MEDIUM EPSS 8.6%
Published May 11, 20261mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Medium
Find Similar
Published May 11, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
8.6% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 1

VendorProductVersionRange
bitwardenserver* <2026.4.1

References 5

  • github.com https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758
    Patch
  • github.com https://github.com/bitwarden/server/pull/7394
    Issue TrackingPatch
  • github.com https://github.com/bitwarden/server/releases/tag/v2026.4.1
    Release Notes
  • sanjokkarki.com.np https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass
    ExploitThird Party Advisory
  • vulncheck.com https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import
    Third Party Advisory

Remediation

  • github.com https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758
    Patch
  • github.com https://github.com/bitwarden/server/pull/7394
    Issue TrackingPatch