{"id":"CVE-2026-28214","state":"PUBLISHED","title":"Firebird server hangs when using specific clumplet on batch creation","description":"Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.","publishedAt":"2026-04-17T18:35:46.974Z","updatedAt":"2026-04-20T13:46:08.635Z","severity":{"score":6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["FirebirdSQL firebird"],"affected":[{"vendor":"FirebirdSQL","product":"firebird","versions":[{"version":">= 3.0.0, < 3.0.14","status":"affected"},{"version":">= 4.0.0, < 4.0.7","status":"affected"},{"version":">= 5.0.0, < 5.0.4","status":"affected"}]}],"references":["https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7cq5-994r-jhrf","https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14","https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7","https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4"],"weaknesses":["CWE-190","CWE-835"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/28xxx/CVE-2026-28214.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28214","state":"PUBLISHED","datePublished":"2026-04-17T18:35:46.974Z","dateUpdated":"2026-04-20T13:46:08.635Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-25T15:28:40.649Z"},"containers":{"cna":{"title":"Firebird server hangs when using specific clumplet on batch creation","descriptions":[{"lang":"en","value":"Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14."}],"affected":[{"vendor":"FirebirdSQL","product":"firebird","versions":[{"version":">= 3.0.0, < 3.0.14","status":"affected"},{"version":">= 4.0.0, < 4.0.7","status":"affected"},{"version":">= 5.0.0, < 5.0.4","status":"affected"}]}],"references":[{"url":"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7cq5-994r-jhrf","name":"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7cq5-994r-jhrf","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14","name":"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14","tags":["x_refsource_MISC"]},{"url":"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7","name":"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7","tags":["x_refsource_MISC"]},{"url":"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4","name":"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","baseScore":6,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-835","lang":"en","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-17T18:35:46.974Z"},"source":{"advisory":"GHSA-7cq5-994r-jhrf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-28214","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-04-20T13:41:09.298737Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-20T13:46:08.635Z"}}]}}}