| Title | wbond certvalidator 0.11.1 Denial of Service |
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| Description | certvalidator (wbond) up to 0.11.1 is vulnerable to a denial-of-service via exponential certificate path-building (CWE-400). When processing a certificate chain containing multiple duplicate self-signed intermediate certificates with the same subject, the path-builder explores a factorial number of combinations. At N=9 duplicate intermediates CPU time exceeds 12 seconds. An attacker controlling a certificate chain presented to any application using certvalidator for TLS or X.509 validation can trigger sustained CPU exhaustion. Sibling of pyca/cryptography GHSA-jwv3-5hgf-82ww. CVSS 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). |
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| Source | ⚠️ https://github.com/wbond/certvalidator/issues/56 |
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| User | Anonymous User |
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| Submission | 09/15/2026 00:09 (28 days ago) |
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| Moderation | 10/12/2026 13:31 (28 days later) |
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| Status | Accepted |
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| VulDB entry | 416883 [wbond certvalidator up to 0.11.1 Certificate Path Builder resource consumption] |
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| Points | 20 |
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