Add vpatch-CVE-2026-18577 rule and test - #67
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Hello @crowdsec-automation, Scenarios/AppSec Rule are compliant with the taxonomy, thank you for your contribution! |
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Hello @crowdsec-automation and thank you for your contribution! ❗ It seems that the following scenarios are not part of the 'crowdsecurity/appsec-virtual-patching' collection: 🔴 crowdsecurity/vpatch-CVE-2026-18577 🔴 |
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Hello @crowdsec-automation, ✅ The new VPATCH Rule is compliant, thank you for your contribution! |
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The rule targets the
/loginendpoint identified by the supplied Nuclei template as the N-able N-central authentication surface. The URI is lowercased and URL-decoded to provide case-insensitive matching and normalize encoded requests.The input template does not contain an authentication-bypass payload, unusual HTTP method, parameter, or header pattern that can be reliably detected by a WAF. Consequently, the rule uses the only attack-relevant request element available: the
/loginendpoint. The test template preserves the original GET request and changes the response matcher to status403as required.Classification uses CVE-2026-18577, ATT&CK technique T1190, and CWE-288.
Exploit URL: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18577.yaml