HOMEVULNERABILITIESCVE-2026-35215
HIGH

CVE-2026-35215

CWE-369Published: April 17, 2026· Updated: Apr 20, 2026

7.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-35215 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (4)

→
https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
→
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
→
https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4
→
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-g99w-prq5-29c6

Quick Facts

CVE IDCVE-2026-35215
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-369
CISA KEVNo
EPSS (30d)0.04%
PublishedApr 17, 2026

Related CVEs (CWE-369)

CVE-2026-46470
9.1
CVE-2026-5747
7.5
CVE-2026-25799
7.5
CVE-2026-31884
7.5
CVE-2026-42209
6.5
CVE-2026-34546
6.2

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-35215 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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