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

Fri, 28 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Bouncycastle
Bouncycastle bc-java
CPEs cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*
Vendors & Products Bouncycastle
Bouncycastle bc-java

Wed, 12 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1284
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Mon, 03 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 03 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Legion Of The Bouncy Castle Inc.
Legion Of The Bouncy Castle Inc. bc-java
Vendors & Products Legion Of The Bouncy Castle Inc.
Legion Of The Bouncy Castle Inc. bc-java

Mon, 03 Aug 2026 06:45:00 +0000


Mon, 03 Aug 2026 04:00:00 +0000

Type Values Removed Values Added
Description In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.
Title MLS wire decoder allocates attacker-declared opaque length before bounds check
Weaknesses CWE-789
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber'}


cve-icon MITRE

Status: PUBLISHED

Assigner: bcorg

Published: 2026-08-03T02:55:02.485Z

Updated: 2026-08-03T15:11:39.086Z

Reserved: 2026-06-22T03:41:00.916Z

Link: CVE-2026-12852

cve-icon Vulnrichment

Updated: 2026-08-03T15:11:33.414Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-03T04:16:39.640

Modified: 2026-08-28T16:16:19.197

Link: CVE-2026-12852

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-03T02:55:02Z

Links: CVE-2026-12852 - Bugzilla