CVE-2026-13586

Description

A flaw was found in Bouncy Castle for Java. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by exploiting an iteration-count bound issue in the PKCS#12 Message Authentication Code (MAC) and bag-decryption Key Derivation Function (KDF). This could make the affected system unresponsive or unavailable to legitimate users.

Statement

Moderate: This vulnerability in Bouncy Castle for Java can lead to a denial of service when processing specially crafted PKCS#12 files. Exploitation requires user interaction, as an attacker must convince a user or application to process a malicious file, limiting the impact to availability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score6.5N/AN/A
Attack VectorNetworkN/AN/A
Attack ComplexityLowN/AN/A
Privileges RequiredNoneN/AN/A
User InteractionRequiredN/AN/A
ScopeUnchangedN/AN/A
ConfidentialityNoneN/AN/A
Integrity ImpactNoneN/AN/A
Availability ImpactHighN/AN/A

Vector

Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Understanding the Weakness (CWE)

CWE-606

Availability

Technical Impact: DoS: Resource Consumption (CPU)

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