CVE-2026-105111NVD

Vulnerability Summary

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Commons BCEL.

This only happens when you're using Class2HTML to generate webpages for possibly-attacker-controlled class files, where Class2HTML emitters write attacker class-file strings into HTML unescaped (stored XSS in reports).

This issue affects Apache Commons BCEL: before 6.13.0.

Users are recommended to upgrade to version 6.13.0, which fixes the issue.

Severity Level

LOW(2.3)

Published Date

Oct 6, 2026

Last Modified

Oct 7, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.25%Probability

Root Weakness (CWE)

CWE-79: Cross-site Scripting (XSS) ↗

The software does not neutralize user-controllable input before it is placed in output that is used as a web page.

CVSS v4.0 Base Metrics — Score 2.3 (LOW)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsPresent

Privileges RequiredNone

User InteractionPassive

Confidentiality (Vulnerable System)None

Integrity (Vulnerable System)None

Availability (Vulnerable System)None

Confidentiality (Subsequent System)Low

Integrity (Subsequent System)Low

Availability (Subsequent System)None

CVSS v3.1 Base Metrics — Score 4.7 (MEDIUM)

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeChanged

ConfidentialityLow

IntegrityLow

AvailabilityNone

Affected & Patched Versions

Affected Versions

Apache Software Foundation Apache Commons BCEL < 6.13.0
Apache Software Foundation Apache Commons BCEL < fb72c225cbc6ec3d94060ed6edb269f07428d504

Patched Versions

Apache Software Foundation Apache Commons BCEL 6.13.0
Apache Software Foundation Apache Commons BCEL fb72c225cbc6ec3d94060ed6edb269f07428d504

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