CVE-2026-88344

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Source
https://cve.org/CVERecord?id=CVE-2026-88344
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88344.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-88344
Published
2026-09-22T00:00:00Z
Modified
2026-10-28T11:19:12Z
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
[none]
Details

An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema buffer ends with a digit, the integer digit-scan loop in lex() advances past the end of the input buffer and dereferences the out-of-bounds pointer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.

Database specific 
{
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88344.json"
}
References

Affected packages

Git / github.com/jimjag/flatcc

Affected ranges

Type
GIT
Repo
https://github.com/jimjag/flatcc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.2.0
v0.2.1
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.5a
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.6.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88344.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "298537850230673638645543380304689417130",
                "58619515365624421221682272334695859297",
                "62332699828865659022552210106442614114",
                "229420838458747172363751533671299833382",
                "338858592964460302613713744072750996067",
                "136035547772697195397112517437463071076",
                "170432091886214889760605210489107662067"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-88344-104a7b47",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e",
        "target": {
            "file": "external/lex/luthor.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "133517690763862963477684952232871599946",
            "length": 18181
        },
        "id": "CVE-2026-88344-60932eb1",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e",
        "target": {
            "file": "external/lex/luthor.c",
            "function": "lex"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T11:19:12Z"