bouncycastle: In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI
CVE-2026-8763 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-8763, released August 3, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bouncycastle · Debian 14 | 1.86-1 | DEBIAN-CVE-2026-8763 | Aug 3, 2026 |
| bouncycastle · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle · opensuse-leap 16.0 | 1.85-160000.1.1 | OPENSUSE-SU-2026:21538-1 | Aug 6, 2026 |
| bouncycastle · sles 15.6 | 1.85-150200.3.38.1 | SUSE-SU-2026:3559-1 | Aug 10, 2026 |
| bouncycastle · sles 15.7 | 1.85-150200.3.38.1 | SUSE-SU-2026:3559-1 | Aug 10, 2026 |
| bouncycastle · sles 16.0 | 1.85-160000.1.1 | SUSE-SU-2026:23150-1 | Aug 6, 2026 |
| bouncycastle-javadoc · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-mail · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-pg · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-pkix · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-tls · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-util · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
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