PT-2026-33479 · Firebird+1 · Firebird+1

Published 2026-04-17 · Updated 2026-05-15 · CVE-2026-28214

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:N/AC:L/Au:S/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Firebird versions prior to 5.0.4 Firebird versions prior to 4.0.7 Firebird versions prior to 3.0.14

Description The ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, leading to an infinite loop. An authenticated user with INSERT privileges on any table can exploit this by using a crafted Batch Parameter Block to cause a denial of service against the server.

Recommendations Update to version 5.0.4 Update to version 4.0.7 Update to version 3.0.14

Fix

DoS

Infinite Loop

Integer Overflow

Weakness Enumeration

CWE-835

CWE-190

Related Identifiers

BDU:2026-05720

CVE-2026-28214

OESA-2026-2013

OESA-2026-2014

OESA-2026-2015

OESA-2026-2016

OESA-2026-2017

Affected Products

Firebird

Red Os

References · 34

• https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7cq5-994r-jhrf · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-28214 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35215 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2015 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34232 · Security Note
• https://ubuntu.com/security/CVE-2026-28214 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2017 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-28224 · Security Note
• https://bdu.fstec.ru/vul/2026-05720 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-28214 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-28214 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-65104 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-40342 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-33337 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2014 · Vendor Advisory