SB20261109135 - Fedora EPEL 10.4 update for nextcloud

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Main Vulnerability Database SB20261109135

SB20261109135 - Fedora EPEL 10.4 update for nextcloud

Published: November 9, 2026

Security Bulletin ID SB20261109135
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Reliance on Untrusted Inputs in a Security Decision (CVE-ID: CVE-2026-103923)

CWE-ID: CWE-807 - Reliance on Untrusted Inputs in a Security Decision

CVSSv4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated attacker to bypass KaTeX trust restrictions and cause cross-site scripting when a victim follows a generated link.

The vulnerability exists due to KaTeX accepting an inherited trust setting when prototype pollution already exists or the renderer options prototype is attacker-controlled. An unauthenticated attacker can supply mathematical expressions that generate malicious links if the application inserts the rendered output into a web page without separate sanitization.


Remediation

Install update from vendor's website.

References