CVE-2026-59650
bouncycastle: In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value
CVE-2026-59650 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-59650, released August 3, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
Urgent
CVSS
9.1
critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0034
27th percentile
In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bouncycastle · Debian 14 | 1.86-1 | DEBIAN-CVE-2026-59650 | 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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