CVE-2026-35215 Firebird: DoS via malicious slice descriptor in slice packet

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdldesc function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing...

EUVD-2026-23490

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdldesc function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing...

CVE-2026-34232

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdrstatusvector function does not handle the iscargcstring type when decoding an opresponse packet, causing a server crash when one is encountered in the status vector. An...

EUVD-2026-23482

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when deserializing a slice packet, the xdrdatum function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated...

CVE-2026-33337

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when deserializing a slice packet, the xdrdatum function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated...

CVE-2026-28224 Firebird Null Pointer Dereference via CryptCallback causes DOS

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an opcryptkeycallback packet without prior authentication, the portservercryptcallback handler is not initialized, resulting in a null pointer dereference and...

CVE-2026-28224

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an opcryptkeycallback packet without prior authentication, the portservercryptcallback handler is not initialized, resulting in a null pointer dereference and...

EUVD-2026-23468

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an opcryptkeycallback packet without prior authentication, the portservercryptcallback handler is not initialized, resulting in a null pointer dereference and...

CVE-2026-28224

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an opcryptkeycallback packet without prior authentication, the portservercryptcallback handler is not initialized, resulting in a null pointer dereference and...

CVE-2026-28214

CVE-2026-28214 affects Firebird DBMS. The issue is in the ClumpletReader::getClumpletSize() when parsing a Wide type clumplet, which can overflow totalLength and cause an infinite loop. An authenticated user with INSERT privileges on any table can trigger a denial of service via a crafted Batch P...

CVE-2026-28214

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...

CVE-2025-65104

Firebird is an open-source relational database management system. In versions FB3 of the client library placed incorrect data length values into XSQLDA fields when communicating with FB4 or higher servers, resulting in an information leak. This issue is fixed by upgrading to the FB4 client or...

CVE-2026-27890

Firebird CVE-2026-27890 is a pre-auth DoS flaw. In versions prior to 5.0.4, 4.0.7 and 3.0.14, during authentication the server assumes CNCT_specific_data segments arrive in strictly ascending order. If segments arrive out of order, the Array.grow() method computes a negative size, causing a SIGSE...

CVE-2026-27890 Firebird has Pre-Auth DOS when Processing Out of Order CNCT_specific_data Segments

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when processing CNCTspecificdata segments during authentication, the server assumes segments arrive in strictly ascending order. If segments arrive out of order, the Array class's grow...

CVE-2026-27890

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when processing CNCTspecificdata segments during authentication, the server assumes segments arrive in strictly ascending order. If segments arrive out of order, the Array class's grow...

CVE-2026-28212 Firebird has potential server crash via null pointer dereference when processing op_slice packet

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an opslice network packet, the server passes an unprepared structure containing a null pointer to the SDLinfo function, resulting in a null pointer dereference an...

CVE-2026-28212

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an opslice network packet, the server passes an unprepared structure containing a null pointer to the SDLinfo function, resulting in a null pointer dereference an...

Firebird security vulnerabilities

Firebird is a set of open-source, cross-platform relational database management systems provided by the Firebird Foundation, which include multiple ANSI SQL-92 functions. The Firebird FB3 version has a security vulnerability, which stems from an error in the placement of data length values when t...

Firebird security vulnerabilities

Firebird is a set of open-source, cross-platform relational database management systems provided by the Firebird Foundation, which include multiple ANSI SQL-92 functions. Vulnerabilities exist in versions prior to Firebird 5.0.4, 4.0.7, and 3.0.14. These vulnerabilities stem from the assumption...

PT-2026-33475

Name of the Vulnerable Software and Affected Versions Firebird client library version FB3 Description The FB3 client library places incorrect data length values into XSQLDA fields when communicating with Firebird servers version FB4 or higher, which leads to an information leak. Recommendations...