Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Prior to versions 2.8.13, 2.9.9, and 2.10.4, an attacker can effectively bypass the rate limit and brute force protections by exploiting the application's weak cache-based mechanism. This loophole in security can be combined with other vulnerabilities to attack the default admin account. This flaw undermines a patch for CVE-2020-8827 intended to protect against brute-force attacks. The application's brute force protection relies on a cache mechanism that tracks login attempts for each user. This cache is limited to a defaultMaxCacheSize of 1000 entries. An attacker can overflow this cache by bombarding it with login attempts for different users, thereby pushing out the admin account's failed attempts and effectively resetting the rate limit for that account. This is a severe vulnerability that enables attackers to perform brute force attacks at an accelerated rate, especially targeting the default admin account. Users should upgrade to version 2.8.13, 2.9.9, or 2.10.4 to receive a patch.
CVE-2024-21662
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EPSS
- 54.0%
- KEV
- Not listed
Published
March 18, 2024
Last Modified
January 9, 2025
References (10)
- security-advisories@githubhttps://argo-cd.readthedocs.io/en/stable/security_considerations/#cve-2020-8827-insufficient-anti-automationanti-brute-force
- security-advisories@githubhttps://github.com/argoproj/argo-cd/commit/17b0df1168a4c535f6f37e95f25ed7cd81e1fa4d
- security-advisories@githubhttps://github.com/argoproj/argo-cd/commit/6e181d72b31522f886a2afa029d5b26d7912ec7b
- security-advisories@githubhttps://github.com/argoproj/argo-cd/commit/cebb6538f7944c87ca2fecb5d17f8baacc431456
- security-advisories@githubhttps://github.com/argoproj/argo-cd/security/advisories/GHSA-2vgg-9h6w-m454
- af854a3a-2127-422b-91ae-364da2661108https://argo-cd.readthedocs.io/en/stable/security_considerations/#cve-2020-8827-insufficient-anti-automationanti-brute-force
- af854a3a-2127-422b-91ae-364da2661108https://github.com/argoproj/argo-cd/commit/17b0df1168a4c535f6f37e95f25ed7cd81e1fa4d
- af854a3a-2127-422b-91ae-364da2661108https://github.com/argoproj/argo-cd/commit/6e181d72b31522f886a2afa029d5b26d7912ec7b
- af854a3a-2127-422b-91ae-364da2661108https://github.com/argoproj/argo-cd/commit/cebb6538f7944c87ca2fecb5d17f8baacc431456
- af854a3a-2127-422b-91ae-364da2661108https://github.com/argoproj/argo-cd/security/advisories/GHSA-2vgg-9h6w-m454
Vendor Advisories for CVE-2024-21662(4)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2024:1753Red Hat Product SecurityHigh
Red Hat Security Advisory: Errata Advisory for Red Hat OpenShift GitOps v1.12.1 security update
- RHSA-2024:1752Red Hat Product SecurityHigh
Red Hat Security Advisory: GitOps 1.12.1- Argo CD CLI and MicroShift GitOps security update
- RHSA-2024:1700Red Hat Product SecurityHigh
Red Hat Security Advisory: Errata Advisory for Red Hat OpenShift GitOps v1.10.4 security update
- RHSA-2024:1697Red Hat Product SecurityHigh
Red Hat Security Advisory: Errata Advisory for Red Hat OpenShift GitOps v1.11.3 security update
Patch Availability(4)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | openshift-gitops-1/argocd-rhel9:v1.12.1-2 | 2024-04-10 | redhat |
| redhat | openshift-gitops-argocd-cli-0:1.12.1-4.el9 | 2024-04-10 | redhat |
| redhat | openshift-gitops-1/must-gather-rhel8:v1.11.3-2 | 2024-04-08 | redhat |
| redhat | openshift-gitops-1/must-gather-rhel8:v1.10.4-1 | 2024-04-08 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/argoproj/argo-cd/v2 | — | 2.10.4 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 46× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 106 total refreshes for this CVE.
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Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat
Same CWE
10 shownCWE-307
Frequently asked(5)
What is CVE-2024-21662?
When was CVE-2024-21662 disclosed?
Is CVE-2024-21662 actively exploited?
What is the CVSS score of CVE-2024-21662?
How do I remediate CVE-2024-21662?
Dependency Blast Radius
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