CVE-2026-43640
Last modified
CVE-2026-43640 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.
Description
Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bitwarden | Server | < 2026.4.1 |
References
- https://github.com/bitwarden/server/pull/7403Issue Tracking, Patch
- https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypassExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-43640?
How severe is CVE-2026-43640?
How do I fix CVE-2026-43640?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-43634HestiaCP versions 1.2.0 through 1.9.4 contain an IP spoofing…8.7
- CVE-2026-43636Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-43637Cornac before 2.6.0 contains a path traversal (Tar Slip) vul…9.1
- CVE-2026-43638Bitwarden Server prior to v2026.4.1 contains a missing autho…5.4
- CVE-2026-43639Bitwarden Server prior to v2026.4.0 contains a missing autho…9.1
- CVE-2026-4364IBM Verify Identity Access Container 11.0 through 11.0.2 and…5.4
- CVE-2026-43644podinfo through 6.11.2 contains a reflected cross-site scrip…6.1
- CVE-2026-43646Exposure of Sensitive Information to an Unauthorized Actor v…7.5
- CVE-2026-4365The LearnPress plugin for WordPress is vulnerable to unautho…9.1
- CVE-2026-43652A permissions issue was addressed with additional restrictio…7.5
- CVE-2026-43653The issue was addressed with improved memory handling. This …6.2
- CVE-2026-43654The issue was addressed with improved memory handling. This …7.5
Are you affected by CVE-2026-43640?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST