CVE-2026-105111CWE-79cross-site-scripting

CVE-2026-105111

Medium · published October 7, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
15.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
2.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00252 · 15.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-07T00:17Z
References (3)
https://github.com/apache/commons-bcel/commit/fb72c225cbc6ec3d94060ed6edb269f07428d504.patch · [email protected]https://lists.apache.org/thread.html/co1wfk2lyrmpnfhn49o370pvfl978rw6 · [email protected]http://www.openwall.com/lists/oss-security/2026/10/07/13 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 19:44Z
    Apache Commons BCEL: Class2HTML emits unescaped class strings, enabling stored XSS
    cvelistv5