CVE-2026-34232: CWE-228: Improper Handling of Syntactically Invalid Structure in FirebirdSQL firebird
CVE-2026-34232 is a high-severity vulnerability in FirebirdSQL firebird versions prior to 3. 0. 14, 4. 0. 7, and 5. 0. 4. The vulnerability arises from improper handling of the isc_arg_cstring type in the xdr_status_vector() function when decoding an op_response packet, which can cause the server to crash. An unauthenticated attacker can exploit this by sending a specially crafted op_response packet. This issue results in a denial of service due to server crash.
AI Analysis
Technical Summary
FirebirdSQL firebird contains a vulnerability (CWE-228) in the xdr_status_vector() function where the isc_arg_cstring type is not properly handled during decoding of op_response packets. This flaw allows an unauthenticated attacker to cause a server crash by sending a crafted op_response packet containing this type in the status vector. The vulnerability affects versions prior to 3.0.14, 4.0.7, and 5.0.4. The issue has been addressed in these fixed versions. The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, no privileges required, no user interaction, and impact limited to availability (denial of service).
Potential Impact
Successful exploitation leads to a denial of service condition by crashing the FirebirdSQL server. There is no impact on confidentiality or integrity. The attacker does not require authentication or user interaction to trigger the crash.
Mitigation Recommendations
A fix is available in FirebirdSQL versions 3.0.14, 4.0.7, and 5.0.4. Users should upgrade to these or later versions to remediate this vulnerability. Patch status is confirmed by the version information in the advisory. No other mitigation guidance is provided or necessary.
CVE-2026-34232: CWE-228: Improper Handling of Syntactically Invalid Structure in FirebirdSQL firebird
Description
CVE-2026-34232 is a high-severity vulnerability in FirebirdSQL firebird versions prior to 3. 0. 14, 4. 0. 7, and 5. 0. 4. The vulnerability arises from improper handling of the isc_arg_cstring type in the xdr_status_vector() function when decoding an op_response packet, which can cause the server to crash. An unauthenticated attacker can exploit this by sending a specially crafted op_response packet. This issue results in a denial of service due to server crash.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
FirebirdSQL firebird contains a vulnerability (CWE-228) in the xdr_status_vector() function where the isc_arg_cstring type is not properly handled during decoding of op_response packets. This flaw allows an unauthenticated attacker to cause a server crash by sending a crafted op_response packet containing this type in the status vector. The vulnerability affects versions prior to 3.0.14, 4.0.7, and 5.0.4. The issue has been addressed in these fixed versions. The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, no privileges required, no user interaction, and impact limited to availability (denial of service).
Potential Impact
Successful exploitation leads to a denial of service condition by crashing the FirebirdSQL server. There is no impact on confidentiality or integrity. The attacker does not require authentication or user interaction to trigger the crash.
Mitigation Recommendations
A fix is available in FirebirdSQL versions 3.0.14, 4.0.7, and 5.0.4. Users should upgrade to these or later versions to remediate this vulnerability. Patch status is confirmed by the version information in the advisory. No other mitigation guidance is provided or necessary.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-26T16:22:29.034Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e2889bbdfbbecc59818af8
Added to database: 4/17/2026, 7:23:07 PM
Last enriched: 4/17/2026, 7:38:09 PM
Last updated: 4/17/2026, 8:39:27 PM
Views: 6
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