CVE-2022-43756
MEDIUMCVE-2022-43756 is a medium-severity (CVSS 5.9) CWE-74 vulnerability in github.com/rancher/wrangler. O3 Security confirms whether CVE-2022-43756 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Rancher/Wrangler: Denial of service when processing Git credentials
Real-World Exposure
github.com/rancher/wrangler🐹github.com/rancher/wrangler🐹github.com/rancher/wrangler🐹github.com/rancher/wranglerReal-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 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in SUSE Rancher allows remote attackers to cause denial of service by supplying specially crafted git credentials. This issue affects: SUSE Rancher wrangler version 0.7.3 and prior versions; wrangler version 0.8.4 and prior versions; wrangler version 1.0.0 and prior versions.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/rancher/wrangler | all versions | 0.7.4-security1 |
| 🐹Go | github.com/rancher/wrangler | ≥ 0.8.0&&< 0.8.5-security1 | 0.8.5-security1 |
| 🐹Go | github.com/rancher/wrangler | ≥ 1.0.0&&< 1.0.1 | 1.0.1 |
| 🐹Go | github.com/rancher/wrangler | ≥ 0.8.6&&< 0.8.11 | 0.8.11 |
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/wrangler. 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/wrangler to 0.7.4-security1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-43756 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-2022-43756 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-2022-43756. 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-2022-43756 in your dependencies?
O3 detects CVE-2022-43756 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.