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Vulnerability record · CVE-2026-59647 · published 3 August 2026

CVE-2026-59647: Bouncycastle bc-java allocation without limits vulnerability

Bouncycastle · Bc Java

In Bouncy Castle for Java before 1.85, CRMF/CMP password-MAC honours unbounded iteration count. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

6.9 CVSS 4.0 Medium EPSS 0.42% · top 65.2% CWE-770 · Allocation without limits
6.9CVSS 4.0 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
28 Aug 2026Last modified by NVD

Description

In Bouncy Castle for Java before 1.85, CRMF/CMP password-MAC honours unbounded iteration count. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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:

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/bcgit/bc-java/commit/c99d6427d6818d04165b07b45dfda96f2b384c53 Patch
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059647 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-59647), CISA KEV, FIRST EPSS (scores of 2026-10-13). This page is refreshed as NVD updates the record.