CVE-2026-12852
High
Description
In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.
SeverityHigh
CVSS7.5
Exploit probability—
ProductBouncycastle Bc-java
PublishedAug 3, 2026
First seenAug 3, 2026
Weakness typeCWE-789CWE-789
How to fix
Update
- bouncycastle bc-java1.85 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bouncycastle bc-java | v < 1.85 | 1.85 |
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