Vendor
Bouncy Castle vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 15 vulnerabilities in Bouncy Castle: 0 in the last 7 days and 13 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-13506, was published on 3 August 2026. 2 technologies have a page of their own.
- Last 7 days
- 0
- Last 90 days
- 13
- Critical, all time
- 2
- Exploited in the wild
- 0
About Bouncy Castle
The Legion of the Bouncy Castle is a charity that provides a suite of open-source cryptography APIs for Java and C#.
Bouncy Castle technologies
Latest Bouncy Castle vulnerabilities
- CVE-2026-13506: Bouncy Castle ASN.1 sequence nesting-depth guard bypasshighCVSS 7.5EPSS 0.4%
- CVE-2026-8763: In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also…criticalCVSS 9.1EPSS 0.4%
- CVE-2026-59650: Bouncy Castle MTI/A0 DH agreement unvalidated peer valuecriticalCVSS 9.1EPSS 0.4%
- CVE-2026-59649: Bouncy Castle OpenPGP denial of service via unbounded subpacket lengthhighCVSS 7.5EPSS 0.5%
- CVE-2026-59646: Bouncy Castle DTLS handshake buffer overflowhighCVSS 7.5EPSS 0.6%
- CVE-2026-59645: Bouncy Castle for Java OER parser unbounded recursion in IEEE 1609.2 schemahighCVSS 7.5EPSS 0.5%
- CVE-2026-59644: Bouncy Castle for Java MLS hash-ratchet generation counter validation bypasshighCVSS 7.5EPSS 0.5%
- CVE-2026-59642: Bouncy Castle CMS AuthenticatedData MAC bypass with authAttrshighCVSS 7.5EPSS 0.2%
- CVE-2026-59640: Bouncy Castle OpenPGP CFB oracle vulnerability in symmetric key pathsmediumCVSS 5.3EPSS 0.4%
- CVE-2026-59639: Bouncy Castle for Java CMS signature verification bypasshighCVSS 7.5EPSS 0.2%
- CVE-2026-59638: Bouncy Castle for Java JSSE hostname verifier CN-fallback enabled by defaultmediumCVSS 6.5EPSS 0.4%
- CVE-2026-15055: Bouncy Castle PKCS#8 PBES2 unbounded KDF cost vulnerabilityhighCVSS 8.2EPSS 0.3%
- CVE-2026-12185: Bouncy Castle for Java BKS/UBER keystore memory allocation DoShighCVSS 8.6EPSS 0.3%
- CVE-2026-5588: Bouncy Castle BC-JAVA signature bypass in CompositeVerifiermediumCVSS 4EPSS 0.7%
- CVE-2024-34447: Bouncy Castle Java Cryptography API DNS poisoning in BCJSSEmediumCVSS 5.9EPSS 0.8%
Most severe Bouncy Castle vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-8763: In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also…criticalCVSS 9.1EPSS 0.4%
- CVE-2026-59650: Bouncy Castle MTI/A0 DH agreement unvalidated peer valuecriticalCVSS 9.1EPSS 0.4%
- CVE-2026-12185: Bouncy Castle for Java BKS/UBER keystore memory allocation DoShighCVSS 8.6EPSS 0.3%
- CVE-2026-15055: Bouncy Castle PKCS#8 PBES2 unbounded KDF cost vulnerabilityhighCVSS 8.2EPSS 0.3%
- CVE-2026-59646: Bouncy Castle DTLS handshake buffer overflowhighCVSS 7.5EPSS 0.6%
- CVE-2026-59649: Bouncy Castle OpenPGP denial of service via unbounded subpacket lengthhighCVSS 7.5EPSS 0.5%
- CVE-2026-59645: Bouncy Castle for Java OER parser unbounded recursion in IEEE 1609.2 schemahighCVSS 7.5EPSS 0.5%
- CVE-2026-59644: Bouncy Castle for Java MLS hash-ratchet generation counter validation bypasshighCVSS 7.5EPSS 0.5%
- CVE-2026-13506: Bouncy Castle ASN.1 sequence nesting-depth guard bypasshighCVSS 7.5EPSS 0.4%
- CVE-2026-59639: Bouncy Castle for Java CMS signature verification bypasshighCVSS 7.5EPSS 0.2%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 13 | 2 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/bouncy-castle.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Bouncy Castle vulnerabilities", https://junglewise.ai/threats/vendors/bouncy-castle, 26 September 2026.