Infinite loop 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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Test your applications- Snyk IDSNYK-DOTNET-BOUNCYCASTLECRYPTOGRAPHY-20537011
- published6 Oct 2026
- disclosed2 Oct 2026
Introduced: 2 Oct 2026
NewCVE-2026-63570 (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 Infinite loop in Pkcs12Store.GetCertificateChain in crypto/src/pkcs/Pkcs12Store.cs. An attacker can force the call to never return and exhaust CPU and memory by supplying a crafted PKCS#12 file with issuer links that form a cycle, such as certificates whose AuthorityKeyIdentifier extensions refer to each other. When an application loads the malicious store and requests a key entry’s certificate chain, the chain-building logic keeps following issuer links without tracking already visited certificates, eventually ending in an OutOfMemoryException.