7.5

CVE-2026-34232: firebirdsql firebird

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-34232DEBIAN-CVE-2026-34232
Published 17-04-2026Last modified 20-04-2026
Open JSON

Vulnerability summary

CVE-2026-34232 is a high (CVSS 7.5) vulnerability in firebirdsql firebird. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 52.3% 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
0.69%
0%100%
Low · +0.23 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 5.0.4, 4.0.7 and 3.0.14, the xdr_status_vector() function does not handle the isc_arg_cstring type when decoding an op_response packet, causing a server crash when one is encountered in the status vector. An unauthenticated attacker can exploit this by sending a crafted op_response packet to 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

0.69%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

+0.23 pp

From 0.47% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.69%

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

3 vendors · 5 products

References

7 links