7.5

CVE-2026-28212: firebirdsql firebird NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-28212DEBIAN-CVE-2026-28212
Published 17-04-2026Last modified 20-04-2026
Open JSON

Vulnerability summary

CVE-2026-28212 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in firebirdsql firebird. EPSS estimates a 0.75% chance of exploitation in the next 30 days, higher than 54.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.75%
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. 20-04-2026
    Last modifiedVulnerability information updated.

Description

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an op_slice network packet, the server passes an unprepared structure containing a null pointer to the SDL_info() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 5.0.4, 4.0.7 and 3.0.14.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.75%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

+0.25 pp

From 0.50% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.75%

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< 3.0.14 | ≥ 4.0.0, < 4.0.7 | ≥ 5.0.0, < 5.0.4

3 vendors · 5 products

References

7 links