PT-2026-39717 · Bitwarden · Bitwarden Server

Sanjok Karki · Published 2026-05-11 · Updated 2026-05-16 · CVE-2026-43640

Positive Technologies (AI Summary)

CVSS v4.0

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Bitwarden Server versions prior to 2026.4.1

Description An issue exists where master-password re-authentication is not required when retrieving or rotating an organization's SCIM API key. This allows an authenticated user with SCIM management privileges to obtain the key using only a valid session.

Recommendations Update to version 2026.4.1 or later.

Exploit

Fix

Weakness Enumeration

CWE-303

Related Identifiers

CVE-2026-43640

Affected Products

Bitwarden Server

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43640.json · Exploit
• 🔥 https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass · Exploit
• https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083 · Patch
• https://github.com/bitwarden/server/pull/7403 · Patch
• https://osv.dev/vulnerability/CVE-2026-43640 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43640 · Security Note
• https://github.com/bitwarden/server/releases/tag/v2026.4.1 · Note
• https://github.com/bitwarden/server · Note
• https://vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key · Note
• https://t.me/cveNotify/163725 · Telegram Post
• https://twitter.com/CVEnew/status/2053932409079693379 · Twitter Post
• https://twitter.com/Netlas_io/status/2054227644825133245 · Twitter Post
• https://twitter.com/ksg93rd/status/2054374982818419015 · Twitter Post
• https://t.me/netlas/565 · Telegram Post