SQLite before 3.53.2 Heap Buffer Overflow via FTS5 fts5ChunkIterate_CVE-2026-11824

{
    "lastseen": "",
    "description": "SQLite before 3.53.2 contains a heap-based buffer overflow vulnerability in the FTS5 full-text search extension that allows attackers to cause a crash or execute arbitrary code by supplying a crafted database with malicious continuation page metadata specifying a szLeaf value smaller than 4. Attackers can trigger an integer underflow in fts5ChunkIterate() causing an inflated remaining byte count during FTS5 MATCH query processing, leading to a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5.",
    "published": "2026-06-09T19:21:42.603Z",
    "modified": "2026-06-09T19:41:18.725Z",
    "type": "cve",
    "title": "SQLite before 3.53.2 Heap Buffer Overflow via FTS5 fts5ChunkIterate",
    "source": "VulnCheck",
    "references": "https://sqlite.org/src/info/061febcf41ca\nhttps://sqlite.org/src/info/4a5ad516ea93\nhttps://sqlite.org/releaselog/3_53_2.html\nhttps://www.vulncheck.com/advisories/sqlite-before-heap-buffer-overflow-via-fts5-fts5chunkiterate",
    "id": "CVE-2026-11824",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "SQLite SQLite 0",
    "sourceHref": "",
    "cvss": {
        "score": 8.5,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "SQLite",
    "version": "0",
    "vendor": "SQLite",
    "ai_description": "Heap-based buffer overflow in SQLite FTS5 extension via crafted database",
    "ai_severity": "High",
    "ai_vendor": "SQLite",
    "ai_product": "SQLite",
    "ai_version": "before 3.53.2",
    "ai_score": 8.5
}