CVE-2026-34232
Firebird: DoS via `op_response` packet from client
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-228 |
| Vendor | firebirdsql |
| Product | firebird |
| Published | Apr 17, 2026 |
Stay Ahead of the Next One
Get instant alerts for firebirdsql firebird
Be the first to know when new high vulnerabilities affecting firebirdsql firebird are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
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
Affected Versions
FirebirdSQL / firebird
>= 3.0.0, < 3.0.14 >= 4.0.0, < 4.0.7 >= 5.0.0, < 5.0.4
References
github.com: https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2 github.com: 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