CVE-2026-13586 Details
Description
In Bouncy Castle for Java before 1.85, PKCS#12 MAC and bag-decryption KDF iteration-count bound (DoS). This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).
A denial-of-service vulnerability has been identified in Bouncy Castle for Java, specifically in versions prior to 1.85, as well as in the LTS versions prior to 2.73.12. This vulnerability affects the PKCS#12 MAC and bag-decryption key derivation function (KDF) iteration count, allowing for potential denial-of-service conditions. Additionally, Bouncy Castle for Java FIPS (BC-FJA) versions prior to 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series), and 2.1.3 (2.1.X series) are also impacted.
Users can update to Bouncy Castle for Java version 1.85 or later, or to version 2.73.12 or later for the LTS release. For Bouncy Castle FIPS users, version 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series) should be used.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/bcgit/bc-java/commit/75d60dfb4ca72bea6da96234138bc9b1556ef5b0 | bcorg | Patch |
| https://github.com/bcgit/bc-java/commit/fa59cc23502f73def89d94374540cc92af647b96 | bcorg | Patch |
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9013586 | bcorg | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | bcorg |
Affected Products
| Product | Versions |
|---|---|
| bouncycastle bc-java | < 1.85 |
CPE
Remediation
| |
| bouncycastle bouncy castle for java lts | <= 2.73.11 |
CPE
Remediation
| |
| bouncycastle fips java api | >= 1.0.0, < 1.0.2.7 >= 2.0.0, < 2.0.2 >= 2.1.0, < 2.1.3 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 28, 2026 | Initial Analysis | [email protected] |
| Aug 3, 2026 | CVE Modified | CISA-ADP |
| Aug 3, 2026 | CVE Modified | bcorg |
| Aug 3, 2026 | New CVE Received | bcorg |