High CVSS 7.1

CVE-2026-59651

NVD analysis in progress

In Bouncy Castle for Java before 1.85, BKS keystore accepts legacy version with 16-bit integrity MAC key. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

What this means

Exposure: Exploitable remotely over the network and without authentication — but only if a user opens booby-trapped content.
Impact: An attacker can modify or destroy data.
Likelihood: Its EPSS score stays low: nothing points to imminent exploitation, which is no reason to leave it unpatched.

What to doFold into the next patch cycle.

Read automatically from the CVSS vector, the weakness type (CWE) and the EPSS score. The technical description above remains the one published by NIST.

Published: 3 August 2026
CVSS: 7.1 (v4.0) CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
EPSS: 0.16% probability of exploitation within 30 days · above 6% of all CVEs
Weakness: CWE-326
Sources: nvd

References

https://nvd.nist.gov/vuln/detail/CVE-2026-59651