SEPTEMBER 19, 2026
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Case File

CVE-2026-58063

MEDIUM · CVSS 5.3 EPSS 0.35% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-03 · Last synced 2026-09-02

CyberRota Analysis

AI-Generated

Bouncy Castle for Java versions prior to 1.85, along with specific LTS and FIPS versions, are vulnerable due to the BCFKS keystore loading process, which improperly honors unbounded Key Derivation Function (KDF) costs from untrusted files. This flaw could allow an attacker to exploit the KDF settings, potentially leading to denial of service or excessive resource consumption. Organizations using affected versions of Bouncy Castle for cryptographic operations should prioritize patching to mitigate these risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-58063
Severity
MEDIUM
CVSS
5.3
EPSS
0.35%
Java

Original NVD Description

In Bouncy Castle for Java before 1.85, BCFKS keystore load honours unbounded KDF cost from untrusted file. 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).