Inefficient Algorithmic Complexity 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-20537006
- published6 Oct 2026
- disclosed2 Oct 2026
Introduced: 2 Oct 2026
NewCVE-2026-103604 (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 Inefficient Algorithmic Complexity in IetfUtilities.ValueToString and X509Name.ToString in the X.509 distinguished name string conversion code. An attacker can exhaust CPU by supplying a certificate, CRL, certification request, or other ASN.1 structure with a distinguished name whose attribute value is very long and contains many escapable characters, such as commas, or leading/trailing spaces, causing the name to be converted to a string for logging, display, comparison, or path validation.