Improper Validation of Array Index Affecting mapserver package, versions [6.4.0,8.6.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-MAPSERVER-17111834
- published31 May 2026
- disclosed27 May 2026
- creditMarkLee131
Introduced: 27 May 2026
NewCVE-2026-45104 (opens in a new tab)How to fix?
Upgrade mapserver to version 8.6.3 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Array Index via the SLD_BODY parameter in WMS requests during SLD <ElseFilter> rule parsing. An attacker can cause a denial of service by submitting a specially crafted SLD payload that triggers a NULL pointer dereference.