Is CVE-2026-5588 actively exploited?

No active exploitation of CVE-2026-5588 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5588 be exploited remotely?

Yes. CVE-2026-5588 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5588?

CVE-2026-5588 has a CVSS score of 6.3 (MEDIUM).

HOME VULNERABILITIESCVE-2026-5588

MEDIUM

CVE-2026-5588

CWE-327Published: April 15, 2026· Updated: Apr 21, 2026

6.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.2th

Official Description

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules). This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java.

This issue affects BC-JAVA: from 1.67 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11.

NVD Source

Technical Analysis

CVE-2026-5588 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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