CVE-2024-58259
HIGHCVE-2024-58259 is a high-severity (CVSS 8.2) CWE-770 vulnerability in github.com/rancher/rancher. O3 Security confirms whether CVE-2024-58259 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Rancher affected by unauthenticated Denial of Service
Real-World Exposure
github.com/rancher/rancher🐹github.com/rancher/rancher🐹github.com/rancher/rancher🐹github.com/rancher/rancher🐹github.com/rancher/rancherReal-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
A vulnerability has been identified within Rancher Manager in which it did not enforce request body size limits on certain public (unauthenticated) and authenticated API endpoints. This allows a malicious user to exploit this by sending excessively large payloads, which are fully loaded into memory during processing, leading to Denial of Service (DoS).
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/rancher/rancher | ≥ 2.12.0&&< 2.12.1 | 2.12.1 |
| 🐹Go | github.com/rancher/rancher | ≥ 2.11.0&&< 2.11.5 | 2.11.5 |
| 🐹Go | github.com/rancher/rancher | ≥ 2.10.0&&< 2.10.9 | 2.10.9 |
| 🐹Go | github.com/rancher/rancher | ≥ 2.9.0&&< 2.9.11 | 2.9.11 |
| 🐹Go | github.com/rancher/rancher | all versions | 0.0.0-20250813072957-aee95d4e2a41 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/rancher/rancher. 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
Update github.com/rancher/rancher to 2.12.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-58259 is resolved across your whole dependency graph.
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-2024-58259 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-2024-58259. 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-2024-58259 in your dependencies?
O3 detects CVE-2024-58259 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.