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mapserv.c in mapserv in MapServer 4.x before 4.10.4 and 5.x before 5.2.2 does not ensure that the string holding the id parameter ends in a '\0' character, which allows remote attackers to conduct buffer-overflow attacks or have unspecified other impact via a long id parameter in a query action.
Use CWE-119, Osgeo vendor hub and Mapserver product page to widen CVE-2009-1176 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2010-2540, CVE-2017-5522 and CVE-2025-59431 for nearby disclosures in the same product family.