# Legion of the Bouncy Castle BouncyCastle.Cryptography vulnerabilities

Source: https://junglewise.ai/threats/technologies/legion-of-the-bouncy-castle-bouncycastle-cryptography  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/legion-of-the-bouncy-castle-bouncycastle-cryptography.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 11 vulnerabilities in Legion of the Bouncy Castle BouncyCastle.Cryptography: 0 in the last 7 days and 11 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-63578, was published on 2 October 2026. Nothing in the last four weeks, down from 11 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 11
- All time: 11 (0 critical, 0 exploited in the wild)

## About Legion of the Bouncy Castle BouncyCastle.Cryptography

BouncyCastle.Cryptography is a .NET cryptography library providing encryption and security algorithms.

## Latest Legion of the Bouncy Castle BouncyCastle.Cryptography vulnerabilities

- [CVE-2026-63578: Bouncy Castle Cryptography unbounded resource allocation in password-based key decryption](https://junglewise.ai/threats/cve-2026-63578-allocation-of-resources-without-limits-in-password-based-private) (info, published 2 Oct 2026)
- [CVE-2026-63577: Bouncy Castle improper certificate name-constraint validation](https://junglewise.ai/threats/cve-2026-63577-improper-certificate-validation-in-the-directoryname-name) (info, published 2 Oct 2026)
- [CVE-2026-63576: Bouncy Castle C# improper certificate validation in URI name constraints](https://junglewise.ai/threats/cve-2026-63576-improper-certificate-validation-in-pkixnameconstraintvalidator) (info, published 2 Oct 2026)
- [CVE-2026-63575: Bouncy Castle C# PKCS#12 key derivation denial of service](https://junglewise.ai/threats/cve-2026-63575-loop-with-unreachable-exit-condition-in-the-pkcs-12-key) (info, published 2 Oct 2026)
- [CVE-2026-63574: Bouncy Castle memory exhaustion in OpenPGP subpacket parsing](https://junglewise.ai/threats/cve-2026-63574-memory-allocation-with-excessive-size-value-in-the-openpgp) (info, published 2 Oct 2026)
- [CVE-2026-63573: Bouncy Castle RSA PKCS#1 v1.5 padding oracle in CMS key-transport](https://junglewise.ai/threats/cve-2026-63573-observable-discrepancy-in-the-cms-rsa-pkcs-1-v1-5-key-transport) (info, published 2 Oct 2026)
- [CVE-2026-63570: Bouncy Castle .NET infinite loop in certificate chain parsing](https://junglewise.ai/threats/cve-2026-63570-loop-with-unreachable-exit-condition-in-pkcs12store) (info, published 2 Oct 2026)
- [CVE-2026-103602: Bouncy Castle certificate name constraint validation bypass](https://junglewise.ai/threats/cve-2026-103602-improper-certificate-validation-in-pkixnameconstraintvalidator) (info, published 2 Oct 2026)
- [CVE-2026-63568: Bouncy Castle CMP/CRMF password-based MAC resource exhaustion](https://junglewise.ai/threats/cve-2026-63568-allocation-of-resources-without-limits-or-throttling-in-the-cmp) (info, published 2 Oct 2026)
- [CVE-2026-63566: Bouncy Castle DTLS handshake reassembly memory exhaustion](https://junglewise.ai/threats/cve-2026-63566-memory-allocation-with-excessive-size-value-in-the-dtls-handshake) (info, published 2 Oct 2026)
- [CVE-2026-15999: Bouncy Castle AES-CCM authentication tag validation bypass](https://junglewise.ai/threats/cve-2026-15999-improper-validation-of-integrity-check-value-in-the-aes-ccm) (info, published 2 Oct 2026)

## Most severe Legion of the Bouncy Castle BouncyCastle.Cryptography vulnerabilities

- [CVE-2026-63566: Bouncy Castle DTLS handshake reassembly memory exhaustion](https://junglewise.ai/threats/cve-2026-63566-memory-allocation-with-excessive-size-value-in-the-dtls-handshake) (info, published 2 Oct 2026)
- [CVE-2026-63578: Bouncy Castle Cryptography unbounded resource allocation in password-based key decryption](https://junglewise.ai/threats/cve-2026-63578-allocation-of-resources-without-limits-in-password-based-private) (info, published 2 Oct 2026)
- [CVE-2026-63574: Bouncy Castle memory exhaustion in OpenPGP subpacket parsing](https://junglewise.ai/threats/cve-2026-63574-memory-allocation-with-excessive-size-value-in-the-openpgp) (info, published 2 Oct 2026)
- [CVE-2026-63568: Bouncy Castle CMP/CRMF password-based MAC resource exhaustion](https://junglewise.ai/threats/cve-2026-63568-allocation-of-resources-without-limits-or-throttling-in-the-cmp) (info, published 2 Oct 2026)
- [CVE-2026-63573: Bouncy Castle RSA PKCS#1 v1.5 padding oracle in CMS key-transport](https://junglewise.ai/threats/cve-2026-63573-observable-discrepancy-in-the-cms-rsa-pkcs-1-v1-5-key-transport) (info, published 2 Oct 2026)
- [CVE-2026-63577: Bouncy Castle improper certificate name-constraint validation](https://junglewise.ai/threats/cve-2026-63577-improper-certificate-validation-in-the-directoryname-name) (info, published 2 Oct 2026)
- [CVE-2026-103602: Bouncy Castle certificate name constraint validation bypass](https://junglewise.ai/threats/cve-2026-103602-improper-certificate-validation-in-pkixnameconstraintvalidator) (info, published 2 Oct 2026)
- [CVE-2026-15999: Bouncy Castle AES-CCM authentication tag validation bypass](https://junglewise.ai/threats/cve-2026-15999-improper-validation-of-integrity-check-value-in-the-aes-ccm) (info, published 2 Oct 2026)
- [CVE-2026-63576: Bouncy Castle C# improper certificate validation in URI name constraints](https://junglewise.ai/threats/cve-2026-63576-improper-certificate-validation-in-pkixnameconstraintvalidator) (info, published 2 Oct 2026)
- [CVE-2026-63570: Bouncy Castle .NET infinite loop in certificate chain parsing](https://junglewise.ai/threats/cve-2026-63570-loop-with-unreachable-exit-condition-in-pkcs12store) (info, published 2 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 11 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 11 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Legion of the Bouncy Castle BouncyCastle.Cryptography vulnerabilities", https://junglewise.ai/threats/technologies/legion-of-the-bouncy-castle-bouncycastle-cryptography, 9 November 2026.