Search/CVE-2026-12816
● CVE — High

CVE-2026-12816

VendorbouncycastleProductbc-java, bouncy castle for java ltsDiscoveredAug 3, 2026UpdatedSep 2, 2026

In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

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CVSS v3.1
7.5 HIGH
EPSS
0.18%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Sep 25, 2026
▲ 0.02pp
0.16% → 0.18% over 4 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityHIGH
AvailabilityNONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Connections
3 relationships
Timeline
disclosure → media coverage
Aug 3, 2026
Disclosure — published as a CVE record. · last revised by NVD Sep 2, 2026