How severe is CVE-2021-26923?

CVE-2021-26923 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-26923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26923?

CVE-2021-26923 affects Argoproj Argo Cd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26923?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-26923 published?

CVE-2021-26923 was published on 2021-03-15 and last updated on 2026-06-17.

CVE-2021-26923

CVE-2021-26923 is a high-severity vulnerability in Argoproj Argo Cd with a CVSS 3.x base score of 7.5. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
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. Accessing the endpoint /api/version leaks internal information for the system, and this endpoint is not protected with authentication.

Frequently asked questions

What is CVE-2021-26923?: An issue was discovered in Argo CD before 1.8.4. Accessing the endpoint /api/version leaks internal information for the system, and this endpoint is not protected with authentication.
How severe is CVE-2021-26923?: CVE-2021-26923 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-26923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26923?: CVE-2021-26923 affects Argoproj Argo Cd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26923?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-26923 published?: CVE-2021-26923 was published on 2021-03-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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