CVE-2026-33337
Last modified
CVE-2026-33337 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 xdr_datum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
Description
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 xdr_datum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. An unauthenticated attacker can exploit this by sending a crafted packet to the server, potentially causing a crash or other security impact. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Firebirdsql | Firebird | >= 3.0.0, < 3.0.14 |
| Firebirdsql | Firebird | >= 4.0.0, < 4.0.7 |
| Firebirdsql | Firebird | >= 5.0.0, < 5.0.4 |
References
- https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-89mq-229g-x47pExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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