SB2026042023 - Fedora EPEL 9 update for mapserver
Published: April 20, 2026
Security Bulletin ID
SB2026042023
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-33721)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in msSLDParseRasterSymbolizer when parsing a crafted SLD ColorMap/Categorize structure with more than 100 Threshold elements. A remote attacker can send a specially crafted SLD request to cause a denial of service.
The issue is commonly reachable via WMS GetMap with SLD_BODY, depending on deployment configuration.
Remediation
Install update from vendor's website.