CVE-2026-103863

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 51/100
Published: 2026-11-05 Modified: 2026-11-12 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: Required
S: Changed
C: Low
I: Low
A: None

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling Engine. Content-Type, charset, and redirect changes from an included component evade the  protectheaders / checkcontenttype  enforcement through setHeader(), repeated calls to setContentType(), the charset APIs, Servlet 6.1 redirect overloads, and stale config - enabling stored XSS despite enabled protections. This issue affects Apache Sling Engine before 3.0.4. Users are recommended to upgrade to version 3.0.4, which fixes the issue.

Bug Bounty Relevance

51 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

5.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

0.19%
Raw Score 0.001940
Percentile 9.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00194
2026-11-12
0.00194
2026-11-10
0.00228
2026-11-09
0.00228
2026-11-08
0.00228
2026-11-07
0.00228
2026-11-06
0.00228

Intelligence Sources

mitre ref →
nvd ref →