CVE-2026-33337

HIGH EPSS 41.5%
Published Apr 17, 20262mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 17, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when deserializing a slice packet, the xdr_datum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. An unauthenticated attacker can exploit this by sending a crafted packet to the server, potentially causing a crash or other security impact. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
41.5% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-120
CWE-502 Deserialization of Untrusted Data Validation

Affected Products 3

VendorProductVersionRange
firebirdsqlfirebird*≥3.0.0  –  <3.0.14
firebirdsqlfirebird*≥4.0.0  –  <4.0.7
firebirdsqlfirebird*≥5.0.0  –  <5.0.4

References 4

  • github.com https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
    Release Notes
  • github.com https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
    Release Notes
  • github.com https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4
    Release Notes
  • github.com https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-89mq-229g-x47p
    ExploitVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.