Unauthenticated argocd-server panic via a malicious Bitbucket-Server webhook payload
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions 1.2.0 through 1.8.7, 2.0.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.7 and 3.0.18 are vulnerable to malicious API requests which can crash the API server and cause denial of service to legitimate clients. Without a configured webhook.bitbucketserver.secret, Argo CD's /api/webhook endpoint crashes when receiving a malformed Bitbucket Server payload (non-array repository.links.clone field). A single unauthenticated request triggers CrashLoopBackOff, and targeting all replicas causes complete API outage. This issue is fixed in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| argoproj | argo-cd | 1.2.0 – 1.8.7; 2.0.0-rc1 to before 2.14.20; 3.2.0-rc1 to before 3.2.0-rc2; 3.1.0-rc1 to before 3.1.8; 3.0.0-rc1 to before 3.0.19 | 2.14.20, 3.2.0-rc2, 3.1.8, 3.0.19 | Patch available | CNA |
| — | github.com/argoproj/argo-cd (Go) | 1.2.0 – 1.8.7 | — | No fix listed | GHSA-f9gq-prrc-hrhc |
| — | github.com/argoproj/argo-cd/v2 (Go) | 2.0.0-rc1 to before 2.14.20 | 2.14.20 | Patch available | GHSA-f9gq-prrc-hrhc |
| — | github.com/argoproj/argo-cd/v3 (Go) | 3.2.0-rc1 to before 3.2.0-rc2 | 3.2.0-rc2 | Patch available | GHSA-f9gq-prrc-hrhc |
| — | github.com/argoproj/argo-cd/v3 (Go) | 3.1.0-rc1 to before 3.1.8 | 3.1.8 | Patch available | GHSA-f9gq-prrc-hrhc |
| — | github.com/argoproj/argo-cd/v3 (Go) | 3.0.0-rc1 to before 3.0.19 | 3.0.19 | Patch available | GHSA-f9gq-prrc-hrhc |
- argo-cd Vendorargoproj Affected 1.2.0 – 1.8.7; 2.0.0-rc1 to before 2.14.20; 3.2.0-rc1 to before 3.2.0-rc2; 3.1.0-rc1 to before 3.1.8; 3.0.0-rc1 to before 3.0.19 Fixed in 2.14.20, 3.2.0-rc2, 3.1.8, 3.0.19 Patch available CNA
- github.com/argoproj/argo-cd (Go) Vendor— Affected 1.2.0 – 1.8.7 Fixed in — No fix listed GHSA-f9gq-prrc-hrhc
- github.com/argoproj/argo-cd/v2 (Go) Vendor— Affected 2.0.0-rc1 to before 2.14.20 Fixed in 2.14.20 Patch available GHSA-f9gq-prrc-hrhc
- github.com/argoproj/argo-cd/v3 (Go) Vendor— Affected 3.2.0-rc1 to before 3.2.0-rc2 Fixed in 3.2.0-rc2 Patch available GHSA-f9gq-prrc-hrhc
- github.com/argoproj/argo-cd/v3 (Go) Vendor— Affected 3.1.0-rc1 to before 3.1.8 Fixed in 3.1.8 Patch available GHSA-f9gq-prrc-hrhc
- github.com/argoproj/argo-cd/v3 (Go) Vendor— Affected 3.0.0-rc1 to before 3.0.19 Fixed in 3.0.19 Patch available GHSA-f9gq-prrc-hrhc
Remediation
- Fix · CNA argo-cd (argoproj) Fixed in 2.14.20, 3.2.0-rc2, 3.1.8, 3.0.19
- Fix · GHSA-f9gq-prrc-hrhc github.com/argoproj/argo-cd/v2 (Go) Fixed in 2.14.20 Advisory →
- Fix · GHSA-f9gq-prrc-hrhc github.com/argoproj/argo-cd/v3 (Go) Fixed in 3.2.0-rc2 Advisory →
- Fix · GHSA-f9gq-prrc-hrhc github.com/argoproj/argo-cd/v3 (Go) Fixed in 3.1.8 Advisory →
- Fix · GHSA-f9gq-prrc-hrhc github.com/argoproj/argo-cd/v3 (Go) Fixed in 3.0.19 Advisory →
Red Hat 3 advisories
- RHSA-2025:18093 Released 2025-10-15 · Red Hat rating ImportantRed Hat OpenShift GitOps v1.18.1 security update
- Red Hat OpenShift GitOps 1.18 registry.redhat.io/openshift-gitops-1/argocd-rhel8, registry.redhat.io/openshift-gitops-1/argocd-rhel9, registry.redhat.io/openshift-gitops-1/gitops-operator-bundle
- RHSA-2025:17731 Released 2025-10-09 · Red Hat rating ImportantRed Hat OpenShift GitOps v1.17.2 security update
- Red Hat OpenShift GitOps 1.17 registry.redhat.io/openshift-gitops-1/argo-rollouts-rhel8, registry.redhat.io/openshift-gitops-1/argocd-rhel8, registry.redhat.io/openshift-gitops-1/argocd-rhel9 +4
- RHSA-2025:17730 Released 2025-10-09 · Red Hat rating ImportantRed Hat OpenShift GitOps v1.16.4 security update
- Red Hat OpenShift GitOps 1.16 registry.redhat.io/openshift-gitops-1/argo-rollouts-rhel8, registry.redhat.io/openshift-gitops-1/argocd-rhel8, registry.redhat.io/openshift-gitops-1/argocd-rhel9 +3
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift GitOps 1.16 | Fixed | RHSA-2025:17730 |
| Red Hat OpenShift GitOps 1.17 | Fixed | RHSA-2025:17731 |
| Red Hat OpenShift GitOps 1.18 | Fixed | RHSA-2025:18093 |
Not affected: 3 products
- Red Hat OpenShift GitOps 1.16
- Red Hat OpenShift GitOps 1.17
- Red Hat OpenShift GitOps 1.18
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59531
- 2026-10-03 Alias added: GHSA-f9gq-prrc-hrhc
References
More argoproj Argo Cd vulnerabilities
- TI-2024-14377 Argo CD vulnerable to Bypassing of Brute Force Protection via Application Crash and In-Memory Data Loss CVSS 3.1CRITICAL 9.8
- TI-2024-14383 Argo CD vulnerable to Bypassing of Rate Limit and Brute Force Protection Using Cache Overflow CVSS 3.1CRITICAL 9.1
- TI-2026-31086 ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction CVSS 3.1CRITICAL 9.6
- TI-2023-20919 Cluster secret might leak in cluster details page in Argo CD CVSS 3.1CRITICAL 9.9
- TI-2024-21088 ArgoCD Vulnerable to Use of Risky or Missing Cryptographic Algorithms in Redis Cache CVSS 3.1CRITICAL 9.1
- TI-2026-33475 Argo CD: Stored XSS in application link annotations enables developer-to-admin privilege escalation CVSS 3.1HIGH 8.7
Sources
- CVE-2025-59531 · CVE Program
- CVE-2025-59531 · NVD
- FIRST EPSS
- GHSA-f9gq-prrc-hrhc · GitHub Advisory Database · CC BY 4.0
- CVE-2025-59531 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences