FirebirdSQL Firebird up to 3.0.13/4.0.6/5.0.3 xdr_status_vector syntactically invalid structure

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k5.88-

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FirebirdSQL Firebird up to 3.0.13/4.0.6/5.0.3. Affected is the function xdr_status_vector. This manipulation causes improper handling of syntactically invalid structure. This vulnerability appears as CVE-2026-34232. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in FirebirdSQL Firebird up to 3.0.13/4.0.6/5.0.3. Affected by this vulnerability is the function xdr_status_vector. The manipulation with an unknown input leads to a improper handling of syntactically invalid structure vulnerability. The CWE definition for the vulnerability is CWE-228. The product does not handle or incorrectly handles input that is not syntactically well-formed with respect to the associated specification. As an impact it is known to affect availability. The summary by CVE is:

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdr_status_vector() function does not handle the isc_arg_cstring type when decoding an op_response packet, causing a server crash when one is encountered in the status vector. An unauthenticated attacker can exploit this by sending a crafted op_response packet to the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-34232 since 03/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 307402 (Linux Distros Unpatched Vulnerability : CVE-2026-34232), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.0.14, 4.0.7 or 5.0.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (307402). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper handling of syntactically invalid structure
CWE: CWE-228 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 307402
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-34232

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firebird 3.0.14/4.0.7/5.0.4

Timelineinfo

03/26/2026 CVE reserved
04/17/2026 +21 days Advisory disclosed
04/17/2026 +0 days VulDB entry created
04/18/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-34232 (🔒)
GCVE (CVE): GCVE-0-2026-34232
GCVE (VulDB): GCVE-100-358093

Entryinfo

Created: 04/17/2026 22:22
Updated: 04/18/2026 08:17
Changes: 04/17/2026 22:22 (64), 04/18/2026 08:17 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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