CVE catalog

CVE-2026-33337

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Apr 17, 2026, 6:48:47 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.54% · Oct 25, 2026

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when deserializing a slice packet, the xdr_datum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. An unauthenticated attacker can exploit this by sending a crafted packet to the server, potentially causing a crash or other security impact. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	firebird3.0	sid	`3.0.14.ds7-1`	fixed
Debian	firebird3.0	forky	`3.0.14.ds7-1`	fixed
Debian	firebird3.0	trixie	`3.0.12.ds7-13+deb13u1`	vulnerable
Debian	firebird3.0	bookworm	`3.0.11.33637.ds4-2+deb12u1`	vulnerable
Cpe	firebird3.0	Not reported	Not reported	vulnerable
Cpe	firebird	Not reported	`3.0.14`	fixed
Cpe	firebird	Not reported	`4.0.7`	fixed
Cpe	firebird	Not reported	`5.0.4`	fixed
Cpe	firebird	Not reported	`5.0.4`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	firebird3.0	source	sid	`3.0.14.ds7-1`	not yet assigned	Not reported	[1134333]
Debian	firebird3.0	source	forky	`3.0.14.ds7-1`	not yet assigned	Not reported	[1134333]
Debian	firebird3.0	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1134333]
Debian	firebird3.0	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1134333]
Cpe	firebird	cpe	Not reported	`3.0.14`	Not reported	Not reported	Not reported
Cpe	firebird	cpe	Not reported	`4.0.7`	Not reported	Not reported	Not reported
Cpe	firebird	cpe	Not reported	`5.0.4`	Not reported	Not reported	Not reported
Cpe	firebird	cpe	Not reported	`5.0.4`	Not reported	NVD-CVE-2026-33337	Not reported

[Debian bug #1134333]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[firebird3.0-common]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird3.0-common-doc]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird3.0-doc]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird3.0-examples]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · all · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird3.0-server]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird3.0-server-core]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird3.0-utils]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[firebird-dev]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[libfbclient2]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
[libib-util]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.11.33637.ds4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12
- 3.0.11.33637.ds4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · firebird3.0 · debian · bookworm; nvd · firebird3.0 · debian · 12

[Debian 13 (Trixie)]

[firebird3.0-common]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird3.0-common-doc]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird3.0-doc]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird3.0-examples]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · all · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird3.0-server]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · amd64 · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · arm64 · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird3.0-server-core]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · amd64 · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · arm64 · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird3.0-utils]Affected
Source package: [firebird3.0]
Details (2)
- 3.0.12.ds7-13+deb13u1 · amd64 · trixie
  Affected
  nvd · firebird3.0 · debian · 13
- 3.0.12.ds7-13+deb13u1 · arm64 · trixie
  Affected
  nvd · firebird3.0 · debian · 13
[firebird4.0-common]Affected
Source package: [firebird4.0]
Details (4)
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie-security
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie-security
  Affected
  nvd · firebird4.0 · debian · 13
[firebird4.0-common-doc]Affected
Source package: [firebird4.0]
Details (4)
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie-security
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie-security
  Affected
  nvd · firebird4.0 · debian · 13
[firebird4.0-doc]Affected
Source package: [firebird4.0]
Details (4)
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie-security
  Affected
  nvd · firebird4.0 · debian · 13
- 4.0.5.3140.ds6-17+deb13u1 · all · trixie-security
  Affected
  nvd · firebird4.0 · debian · 13

Next results

Observed: Oct 27, 2026, 7:59:04 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]