Integer overflow in Firebird - CVE-2026-28214
Published: April 20, 2026
Vulnerability identifier: #VU126556
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-28214
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: firebird.sourceforge.net
Affected software:
Firebird
Firebird
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to an integer overflow in ClumpletReader::getClumpletSize() when parsing a batch parameter block clumplet during batch creation. A remote user can send a specially crafted batch parameter block to cause a denial of service.
Exploitation requires valid authentication and INSERT privilege on a table.
How to mitigate CVE-2026-28214
Install security update from vendor's website.