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6.0 Medium

CVE-2026-28214 Firebird is an open-source relational database management system

Description

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Affected products and versions

Product Affected versions Fixed in
firebird 5.0 5.0.0 → < 5.0.4 5.0.4
firebird 4.0 4.0.0 → < 4.0.7 4.0.7
firebird 3.0 3.0.0 → < 3.0.14 3.0.14

Other CVEs of firebird

The 13 CVEs of firebird →
CVE-2026-40342 Firebird is an open-source relational database management system 10.0 Critical CVE-2026-35215 Firebird is an open-source relational database management system 7.5 High CVE-2026-34232 Firebird is an open-source relational database management system 7.5 High CVE-2026-33337 Firebird is an open-source relational database management system 7.5 High
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