CVE-2026-43638

Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

CVSS 5.3 MEDIUMEPSS 0.2%CWE-862

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 5.3EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado

Lifecycle

11 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Affected products

bitwarden · server

public PoCs found — 1

cve_referencesanjokkarki.com.np/blog/bitwarden-import-org-bypassunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 https://github.com/bitwarden/server/pull/7394 https://github.com/bitwarden/server/releases/tag/v2026.4.1 https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import