What is CVE-2021-26905?

CVE-2021-26905 is a medium-severity vulnerability in 1password Scim Bridge, classified under Improper Authentication. CVSS score: 6.5/10. Published 2021-02-08.

How severe is CVE-2021-26905?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-26905 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in 1password Scim Bridge

CVE-2021-26905

1Password SCIM Bridge before 1.6.2 mishandles validation of authenticated requests for log files, leading to disclosure of a TLS private key.

Vulnerability class: Broken Authentication

Published 2021-02-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

1password Scim Bridge

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

ta-oma/1p-vulns-export

References

app-updates.agilebits.com/product_history/SCIM (Third Party Advisory, Release Notes)
support.1password.com/kb/202102/ (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2021-26905?: CVE-2021-26905 is a medium-severity vulnerability in 1password Scim Bridge, classified under Improper Authentication. CVSS score: 6.5/10. Published 2021-02-08.
How severe is CVE-2021-26905?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-26905 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.