How severe is CVE-2021-26924?

CVE-2021-26924 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-26924 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26924?

CVE-2021-26924 affects Argoproj Argo Cd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26924?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26924 published?

CVE-2021-26924 was published on 2021-03-15 and last updated on 2026-06-17.

CVE-2021-26924

CVE-2021-26924 is a medium-severity vulnerability in Argoproj Argo Cd with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Argoproj Argo Cd
Published: 2021-03-15
Last modified: 2026-06-17

Description

An issue was discovered in Argo CD before 1.8.4. Browser XSS protection is not activated due to the missing XSS protection header.

Frequently asked questions

What is CVE-2021-26924?: An issue was discovered in Argo CD before 1.8.4. Browser XSS protection is not activated due to the missing XSS protection header.
How severe is CVE-2021-26924?: CVE-2021-26924 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-26924 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26924?: CVE-2021-26924 affects Argoproj Argo Cd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26924?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26924 published?: CVE-2021-26924 was published on 2021-03-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*

More vulnerabilities in Argoproj Argo Cd

CVE-2022-29165 — Critical (CVSS 10.0): Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. A critical vulnerability has been discovered…
CVE-2025-55190 — Critical (CVSS 9.9): Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. In versions 2.13.0 through 2.13.8, 2.14.0…
CVE-2023-40029 — Critical (CVSS 9.9): Argo CD is a declarative continuous deployment for Kubernetes. Argo CD Cluster secrets might be managed declaratively…
CVE-2022-24768 — Critical (CVSS 9.9): Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. All unpatched versions of Argo CD starting…
CVE-2024-21652 — Critical (CVSS 9.8): Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Prior to versions 2.8.13, 2.9.9, and 2.10.4,…
CVE-2026-42880 — Critical (CVSS 9.6): Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and…

All CVEs affecting Argoproj Argo Cd →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →