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CVE-2026-28214

Firebird server hangs when using specific clumplet on batch creation

Published: Apr 17, 2026Updated: Apr 24, 2026 Sources: CVE List NVD BDUCWE-190
6.5MEDIUM
NVD MITRE
EPSS Score
1.1%
Top 36.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-190CWE-835

Affected Products

ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Ред База ДанныхOn-premDatabase
Databases / relational
FirebirdSQL
oss-projectaka firebird
firebirdOn-prem
Databases / relational
Firebird Foundation Inc.
oss-projectaka firebird
FirebirdOn-prem
Databases / relational
and 1 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
github.com
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
github.com
https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4
github.com
and 3 more references View all →

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