High severity · published Oct 1, 2025
CVE-2025-59538
Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook
7.5
CVSS
9.4%
EPSS
No
On KEV
Description
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. For versions 2.9.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.6 and 3.0.17, when the webhook.azuredevops.username and webhook.azuredevops.password are not set in the default configuration, the /api/webhook endpoint crashes the entire argocd-server process when it receives an Azure DevOps Push event whose JSON array resource.refUpdates is empty. The slice index [0] is accessed without a length check, causing an index-out-of-range panic. A single unauthenticated HTTP POST is enough to kill the process. This issue is resolved in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)9.4% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AR
argo-cd · argoproj
>= 2.9.0-rc1, < 2.14.20; >= 3.2.0-rc1, < 3.2.0-rc2; >= 3.1.0-rc1, < 3.1.8; >= 3.0.0-rc1, < 3.0.19 · source: vendor
AC
Argo CD · Argoproj
2.9.0 before 2.14.20; 3.0.0 before 3.0.19; 3.1.0 before 3.1.8; 3.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59538
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59538
Patch
https://github.com/argoproj/argo-cd/commit/1a023f1ca7fe4ec942b4b6696804988d5a632baf
Exploit
https://github.com/argoproj/argo-cd/security/advisories/GHSA-gpx4-37g2-c8pv
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