CVE-2026-12852

In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/bcgit/bc-java/commit/a747038bb5bbd5e29fb2b7607ab38af1fd8d1790	Patch
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012852	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-03 04:16

Updated : 2026-08-28 16:16

NVD link : CVE-2026-12852

Mitre link : CVE-2026-12852

CVE.ORG link : CVE-2026-12852

JSON object : View

Products Affected

bouncycastle

bc-java

CWE

CWE-789

Memory Allocation with Excessive Size Value

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