How severe is CVE-2026-35215?

CVE-2026-35215 has a CVSS 3.x base score of 7.5, 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 none, and availability high.

Is CVE-2026-35215 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-2026-35215?

CVE-2026-35215 affects Firebirdsql Firebird. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35215?

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-2026-35215 have an EU (EUVD) identifier?

Yes. CVE-2026-35215 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23490.

When was CVE-2026-35215 published?

CVE-2026-35215 was published on 2026-04-17 and last updated on 2026-06-17.

CVE-2026-35215

CVE-2026-35215 is a high-severity vulnerability in Firebirdsql Firebird with a CVSS 3.x base score of 7.5. 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-369.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23490
Weakness: CWE-369
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, 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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-35215?: CVE-2026-35215 has a CVSS 3.x base score of 7.5, 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 none, and availability high.
Is CVE-2026-35215 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-2026-35215?: CVE-2026-35215 affects Firebirdsql Firebird. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35215?: 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-2026-35215 have an EU (EUVD) identifier?: Yes. CVE-2026-35215 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23490.
When was CVE-2026-35215 published?: CVE-2026-35215 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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