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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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-228","description":"CWE-228: Improper Handling of Syntactically Invalid Structure","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-04-17T18:52:11.693Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2"},{"name":"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14","tags":["x_refsource_MISC"],"url":"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14"},{"name":"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7","tags":["x_refsource_MISC"],"url":"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7"},{"name":"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4","tags":["x_refsource_MISC"],"url":"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4"}],"source":{"advisory":"GHSA-7jq3-6j3c-5cm2","discovery":"UNKNOWN"},"title":"Firebird: DoS via `op_response` packet from client"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-34232","datePublished":"2026-04-17T18:52:11.693Z","dateReserved":"2026-03-26T16:22:29.034Z","dateUpdated":"2026-04-17T18:52:11.693Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-17 20:16:34","lastModifiedDate":"2026-04-17 20:16:34","problem_types":["CWE-228","CWE-228 CWE-228: Improper Handling of Syntactically Invalid Structure"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"34232","Ordinal":"1","Title":"Firebird: DoS via `op_response` packet from client","CVE":"CVE-2026-34232","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"34232","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Firebird: DoS via `op_response` packet from client"}]}}}