Allocation of Resources Without Limits or Throttling Affecting bouncycastle.cryptography package, versions [,2.7.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Oct 2026
- disclosed2 Oct 2026
Introduced: 2 Oct 2026
NewCVE-2026-63568 (opens in a new tab)How to fix?
Upgrade BouncyCastle.Cryptography to version 2.7.0 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the PKMacBuilder iteration-count verification in the CMP/CRMF password-based MAC code. An attacker can send a CMP message or CRMF certificate request with a PBMParameter that declares a very large iteration count, causing ProtectedPkiMessage.Verify or CertificateRequestMessage.IsValidSigningKeyPop to perform an excessive number of hash iterations before the MAC is checked.