What is CVE-2021-26921?

CVE-2021-26921 is a medium-severity vulnerability in Argoproj Argo Cd, classified under Insufficient Session Expiration. CVSS score: 6.5/10. Published 2021-02-09.

How severe is CVE-2021-26921?

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

Vulnerability in Argoproj Argo Cd

CVE-2021-26921

In util/session/sessionmanager.go in Argo CD before 1.8.4, tokens continue to work even when the user account is disabled.

Published 2021-02-09 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.013 (68.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Argoproj Argo Cd

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

github.com/argoproj/argo-cd/compare/v1.8.3...v1.8.4 (Patch, Third Party Advisory)
github.com/argoproj/argo-cd/commit/f5b0db240b4e3abf18e97f6fd99096b4f9e94dc5 (Patch, Third Party Advisory)
github.com/argoproj/argo-cd/security/advisories/GHSA-9h6w-j7w4-jr52 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-26921?: CVE-2021-26921 is a medium-severity vulnerability in Argoproj Argo Cd, classified under Insufficient Session Expiration. CVSS score: 6.5/10. Published 2021-02-09.
How severe is CVE-2021-26921?: Medium severity. CVSS v3 base score is 6.5 out of 10.