CVE-2026-35215: Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the…
CVE-2026-35215 · Severity: high · CVSS 7.5 · Published 2026-04-17
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdl_desc() 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 a division by zero. An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
No. Junglewise Threat Intelligence has no report of CVE-2026-35215 being exploited in the wild.
How severe is CVE-2026-35215?
High severity, with a CVSS score of 7.5, published 17 April 2026.
Which products and versions are affected?
Firebirdsql Firebird. The advisory does not name versions.
Is there a fix for CVE-2026-35215?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-35215?
Check whether you run Firebirdsql Firebird. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.