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Public proof of conceptFix available

CVE-2026-34232

A public proof of concept exists; no exploitation attested.

  • Published2026-04-17
  • Fixed in5.0.4 · 4.0.7 · 3.0.14
  • WeaknessCWE-228

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-04-1720:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-34232?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-34232?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Firebirdsql firebird
BranchAffectedFixed in
5.0≥ 5.0.0, < 5.0.45.0.4
4.0≥ 4.0.0, < 4.0.74.0.7
3.0≥ 3.0.0, < 3.0.143.0.14

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • FirebirdSQL firebird
    Affected
    • = >= 3.0.0, < 3.0.14no fix stated
    • = >= 4.0.0, < 4.0.7no fix stated
    • = >= 5.0.0, < 5.0.4no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-04-17

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • firebirdopenEuler:24.03-LTS-SP3all versions · fixed in 4.0.7.3271-1.oe2403sp3
  • firebirdopenEuler:24.03-LTS-SP1all versions · fixed in 4.0.7.3271-1.oe2403sp1
  • firebirdopenEuler:24.03-LTSall versions · fixed in 4.0.7.3271-1.oe2403
  • firebirdopenEuler:22.03-LTS-SP4all versions · fixed in 3.0.14.33856-1.oe2203sp4
  • firebirdopenEuler:20.03-LTS-SP4all versions · fixed in 3.0.14.33856-1.oe2003sp4
  • firebird3.0Ubuntu:26.10all versions · no fixed version listedand 1 other package
  • firebird3.0Ubuntu:26.04:LTSall versions · no fixed version listedand 1 other package
  • firebird3.0Ubuntu:25.10all versions · no fixed version listedand 1 other package

9 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Firebirdsql firebird to 5.0.4 · 4.0.7 · 3.0.14

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-27
  • CISA-ADPSSVC decisionpoc2026-04-20
  • OpenCVESSVC decisionpoc—
  • CNACVSS 3.17.5known since 2026-10-27
  • CNAweakness (CWE)CWE-228known since 2026-10-27
  • FIRST EPSSEPSS score0.5 %2026-11-03
  • OSVaffected packages—

Identifiers

  • EUVD-2026-23486same flawENISA EUVD · LicenseRef-ENISA-legal-notice
  • OESA-2026-2013advisory covering several CVEsopenEuler · LicenseRef-unstated
  • OESA-2026-2014advisory covering several CVEsopenEuler · LicenseRef-unstated
  • OESA-2026-2015advisory covering several CVEsopenEuler · LicenseRef-unstated
  • OESA-2026-2016advisory covering several CVEsopenEuler · LicenseRef-unstated
  • OESA-2026-2017advisory covering several CVEsopenEuler · LicenseRef-unstated

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-04-17
Last Modified
2026-10-26
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-34232?

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.

Is CVE-2026-34232 actively exploited?

A proof-of-concept exploit exists for CVE-2026-34232, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-34232?

CVE-2026-34232 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record