PgBouncer buffer overflow in SCRAM_CVE-2026-6665

{
    "lastseen": "",
    "description": "The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow.",
    "published": "2026-05-09T00:43:46.762Z",
    "modified": "2026-05-09T00:43:46.762Z",
    "type": "cve",
    "title": "PgBouncer buffer overflow in SCRAM",
    "source": "PostgreSQL",
    "references": "https://www.pgbouncer.org/changelog.html#pgbouncer-125x",
    "id": "CVE-2026-6665",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121"
    ],
    "cvelist": null,
    "sourceData": "n/a PgBouncer 0",
    "sourceHref": "",
    "cvss": {
        "score": 8.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "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": "PgBouncer",
    "version": "0",
    "vendor": "n/a",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}