How severe is CVE-2026-28224?

CVE-2026-28224 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2026-28224 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28224?

CVE-2026-28224 affects Firebirdsql Firebird. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28224?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28224 have an EU (EUVD) identifier?

Yes. CVE-2026-28224 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23468.

When was CVE-2026-28224 published?

CVE-2026-28224 was published on 2026-04-17 and last updated on 2026-06-17.

CVE-2026-28224

CVE-2026-28224 is a high-severity vulnerability in Firebirdsql Firebird with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23468
Weakness: CWE-476
Affected product: Firebirdsql Firebird
Published: 2026-04-17
Last modified: 2026-06-17

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 the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Frequently asked questions

What is 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 op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
How severe is CVE-2026-28224?: CVE-2026-28224 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2026-28224 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28224?: CVE-2026-28224 affects Firebirdsql Firebird. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28224?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28224 have an EU (EUVD) identifier?: Yes. CVE-2026-28224 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23468.
When was CVE-2026-28224 published?: CVE-2026-28224 was published on 2026-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*

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