8.2

CVE-2026-28224: firebirdsql firebird NULL Pointer Dereference

CVSS: 8.2v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-28224DEBIAN-CVE-2026-28224
Published 17-04-2026Last modified 17-04-2026
Open JSON

Vulnerability summary

CVE-2026-28224 is a high (CVSS 8.2) NULL Pointer Dereference vulnerability in firebirdsql firebird. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.72%
0%100%
Low · +0.25 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 17-04-2026
    PublishedVulnerability first disclosed.
  2. 17-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.72%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

+0.25 pp

From 0.46% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.72%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Firebird

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • firebird3.0All versions (No fix recorded) | < 3.0.14.ds7-1
  • firebird4.0All versions (No fix recorded) | < 4.0.7.3271.ds6-1
Ubuntu2 products
  • firebird3.0All versions (No fix recorded)
  • firebird4.0All versions (No fix recorded)
Firebirdsql1 product
  • firebird≥ 3.0.0, < 3.0.14 | < 3.0.14 | ≥ 4.0.0, < 4.0.7 | ≥ 5.0.0, < 5.0.4

3 vendors · 5 products

References

7 links