CVE-2026-33337

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Source
https://cve.org/CVERecord?id=CVE-2026-33337
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33337.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33337
Aliases
  • GHSA-89mq-229g-x47p
Downstream
Related
Published
2026-04-17T18:48:47.953Z
Modified
2026-07-08T08:12:26.844452482Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Firebird has a buffer overflow when parsing corrupted slice packets
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33337.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-120",
        "CWE-502"
    ]
}
References

Affected packages

Git / github.com/firebirdsql/firebird

Affected ranges

Type
GIT
Repo
https://github.com/firebirdsql/firebird
Events
Introduced
1767a517f9c99ec97160cacb452fdcfd83dca9be
Fixed
463bae029a4426deff7e9bb08a8317aaa398c7c7
Introduced
141bb5491d24cb363f03c5a0786a32f73a1faa5b
Fixed
26f6881c9eac77c5e3166d209682c0ebe8dd07c0
Introduced
af1546f15fa871b313ebcc7df1fd2df3c396c616
Fixed
f6d83a28c009ab039ea40ffdb4ccc58f190dfbe6
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.0.14"
        },
        {
            "introduced": "4.0.0"
        },
        {
            "fixed": "4.0.7"
        },
        {
            "introduced": "5.0.0"
        },
        {
            "fixed": "5.0.4"
        }
    ]
}

Affected versions

Other
R3_0_0
R3_0_1
R3_0_2
R3_0_3
R3_0_4
R3_0_5
R3_0_6
R3_0_7
v3.*
v3.0.10
v3.0.11
v3.0.12
v3.0.13
v3.0.8
v3.0.9
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.0.4
v4.0.5
v4.0.6
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.0.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33337.json"