CVE-2025-59537
HIGHargo-cd is vulnerable to unauthenticated DoS attack via malformed Gogs webhook payload
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
github.com/argoproj/argo-cd🐹github.com/argoproj/argo-cd/v2🐹github.com/argoproj/argo-cd/v3🐹github.com/argoproj/argo-cd/v3🐹github.com/argoproj/argo-cd/v3Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
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. With the default configuration, no webhook.gogs.secret set, Argo CD’s /api/webhook endpoint will crash the entire argocd-server process when it receives a Gogs push event whose JSON field commits[].repo is not set or is null. This issue is fixed in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/argoproj/argo-cd | ≥ 1.2.0 | No fix |
| 🐹Go | github.com/argoproj/argo-cd/v2 | ≥ 2.0.0-rc1&&< 2.14.20 | 2.14.20 |
| 🐹Go | github.com/argoproj/argo-cd/v3 | ≥ 3.2.0-rc1&&< 3.2.0-rc2 | 3.2.0-rc2 |
| 🐹Go | github.com/argoproj/argo-cd/v3 | ≥ 3.1.0-rc1&&< 3.1.8 | 3.1.8 |
| 🐹Go | github.com/argoproj/argo-cd/v3 | ≥ 3.0.0-rc1&&< 3.0.19 | 3.0.19 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/argoproj/argo-cd. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
No patched version of github.com/argoproj/argo-cd has shipped for CVE-2025-59537 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2025-59537 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2025-59537. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-59537 in your dependencies?
O3 detects CVE-2025-59537 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.