# Legion of the Bouncy Castle vulnerabilities

Source: https://junglewise.ai/threats/vendors/legion-of-the-bouncy-castle  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 10 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/legion-of-the-bouncy-castle.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 18 vulnerabilities in Legion of the Bouncy Castle: 0 in the last 7 days and 14 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-71888, was published on 3 October 2026. Nothing in the last four weeks, down from 14 vulnerabilities in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 14
- All time: 18 (0 critical, 0 exploited in the wild)

## About Legion of the Bouncy Castle

Provider of open-source cryptography libraries for Java and C#.

## Latest Legion of the Bouncy Castle vulnerabilities

- [CVE-2026-71888: Bouncy Castle AuthenticatedData parser cryptographic validation bypass](https://junglewise.ai/threats/cve-2026-71888-in-bouncy-castle-for-java-before-1-86-the-streaming-cms) (info, published 3 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-2026-63577: 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-2026-63572: Bouncy Castle Cryptography DoS via unbounded iteration count in PKCS#12](https://junglewise.ai/threats/cve-2026-63572-allocation-of-resources-without-limits-in-pkcs-12-keystore) (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-2026-17508: Bouncy Castle for Java unbounded KDF cost parameters](https://junglewise.ai/threats/cve-2026-17508-in-bouncy-castle-for-java-before-1-86-several-password-based-key) (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)
- [CVE-2026-8149: Bouncy Castle BC-LTS GCM decryption failure on X86_64 Linux](https://junglewise.ai/threats/cve-2026-8149-bouncy-castle-bc-lts-gcm-decryption-failure-on-x86-64-linux) (medium, CVSS 4, published 8 May 2026)
- [CVE-2026-5598: Bouncy Castle BC-JAVA timing channel in FrodoKEM](https://junglewise.ai/threats/cve-2026-5598-bouncy-castle-bc-java-timing-channel-in-frodokem) (high, CVSS 4, published 15 Apr 2026)
- [CVE-2026-3505: Bouncy Castle BC-JAVA resource exhaustion in PGP AEAD processing](https://junglewise.ai/threats/cve-2026-3505-bouncy-castle-bc-java-resource-exhaustion-in-pgp-aead-processing) (high, CVSS 4, published 15 Apr 2026)
- [CVE-2025-8916: Bouncy Castle Java DoS in PKIXCertPathReviewer name constraints](https://junglewise.ai/threats/cve-2025-8916-bouncy-castle-java-dos-in-pkixcertpathreviewer-name-constraints) (medium, CVSS 4, published 13 Aug 2025)

## Most severe Legion of the Bouncy Castle vulnerabilities

- [CVE-2026-5598: Bouncy Castle BC-JAVA timing channel in FrodoKEM](https://junglewise.ai/threats/cve-2026-5598-bouncy-castle-bc-java-timing-channel-in-frodokem) (high, CVSS 4, published 15 Apr 2026)
- [CVE-2026-3505: Bouncy Castle BC-JAVA resource exhaustion in PGP AEAD processing](https://junglewise.ai/threats/cve-2026-3505-bouncy-castle-bc-java-resource-exhaustion-in-pgp-aead-processing) (high, CVSS 4, published 15 Apr 2026)
- [CVE-2025-8916: Bouncy Castle Java DoS in PKIXCertPathReviewer name constraints](https://junglewise.ai/threats/cve-2025-8916-bouncy-castle-java-dos-in-pkixcertpathreviewer-name-constraints) (medium, CVSS 4, published 13 Aug 2025)
- [CVE-2026-8149: Bouncy Castle BC-LTS GCM decryption failure on X86_64 Linux](https://junglewise.ai/threats/cve-2026-8149-bouncy-castle-bc-lts-gcm-decryption-failure-on-x86-64-linux) (medium, CVSS 4, published 8 May 2026)
- [CVE-2026-17508: Bouncy Castle for Java unbounded KDF cost parameters](https://junglewise.ai/threats/cve-2026-17508-in-bouncy-castle-for-java-before-1-86-several-password-based-key) (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-2026-63578: 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-2026-63572: Bouncy Castle Cryptography DoS via unbounded iteration count in PKCS#12](https://junglewise.ai/threats/cve-2026-63572-allocation-of-resources-without-limits-in-pkcs-12-keystore) (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)

## Vulnerabilities per week

Nothing in the last four weeks, down from 14 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 | 14 | 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 |

## Legion of the Bouncy Castle technologies

- [Legion of the Bouncy Castle BouncyCastle.Cryptography](https://junglewise.ai/threats/technologies/legion-of-the-bouncy-castle-bouncycastle-cryptography): 11 vulnerabilities

## 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 vulnerabilities", https://junglewise.ai/threats/vendors/legion-of-the-bouncy-castle, 10 November 2026.