Auth bypass in Bitwarden Server
CVE-2026-119414
Bitwarden Server before 2026.10.1 on Entity Framework backends contains an authorization bypass vulnerability that allows organization members to add ciphers to collections they cannot edit. Attackers can call POST /api/ciphers/create, where a nulled UserId is treated as administrative, to inject vault items synced to read-only or inaccessible collections' members.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/bitwarden/server/commit/9030c42bf7d8f9ac2ff9fee85c39588d5eb81499 (patch)
- github.com/bitwarden/server/pull/8482 (issue-tracking, patch)
- github.com/bitwarden/server/blob/v2026.10.0/src/Infrastructure.EntityFramework/… (technical-description)
- github.com/bitwarden/server/blob/v2026.10.0/src/Api/Vault/Controllers/CiphersCo… (technical-description)
- github.com/bitwarden/server/releases/tag/v2026.10.1 (release-notes)
- abraxaslabs.tech/research/bitwarden-cipher-create-acl (third-party-advisory)
- github.com/bitwarden/server (product)
- www.vulncheck.com/advisories/bitwarden-server-before-2026.10.1-authorization-by… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119414?
- CVE-2026-119414 is a medium-severity vulnerability in Bitwarden Server, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-10-30.
- How severe is CVE-2026-119414?
- Medium severity. CVSS v3 base score is 4.3 out of 10.