Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent_CVE-2026-39833

{
    "lastseen": "",
    "description": "The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.",
    "published": "2026-05-22T02:31:26.294Z",
    "modified": "2026-05-22T18:58:08.489Z",
    "type": "cve",
    "title": "Invoking  key constraints not enforced in golang.org/x/crypto/ssh/agent",
    "source": "Go",
    "references": "https://go.dev/issue/79436\nhttps://go.dev/cl/778640\nhttps://go.dev/cl/778641\nhttps://groups.google.com/g/golang-announce/c/a082jnz-LvI\nhttps://pkg.go.dev/vuln/GO-2026-5005",
    "id": "CVE-2026-39833",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "golang.org/x/crypto golang.org/x/crypto/ssh/agent 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
        "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": "golang.org/x/crypto/ssh/agent",
    "version": "0",
    "vendor": "golang.org/x/crypto",
    "ai_description": "In-memory keyring silently accepted keys with ConfirmBeforeUse constraint without enforcing it, allowing keys to sign without confirmation prompts.",
    "ai_severity": "Critical",
    "ai_vendor": "The Go Authors",
    "ai_product": "golang.org/x/crypto/ssh/agent",
    "ai_version": "0",
    "ai_score": 9.1
}