SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured_CVE-2026-48855

{
    "lastseen": "",
    "description": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery.\n\nThe SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.\n\nThis issue affects OTP from OTP 17.0 before 29.0.2, 28.5.0.2 and 27.3.4.13 corresponding to ssh from 3.0.1 before 6.0.1, 5.5.2.1 and 5.2.11.8.",
    "published": "2026-06-10T14:35:49.683Z",
    "modified": "2026-06-10T16:22:24.746Z",
    "type": "cve",
    "title": "SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured",
    "source": "EEF",
    "references": "https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh\nhttps://cna.erlef.org/cves/CVE-2026-48855.html\nhttps://osv.dev/vulnerability/EEF-CVE-2026-48855\nhttps://www.erlang.org/doc/system/versions.html#order-of-versions\nhttps://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6",
    "id": "CVE-2026-48855",
    "bulletinFamily": "",
    "cwe": [
        "CWE-200"
    ],
    "cvelist": null,
    "sourceData": "Erlang OTP 3.0.1\nErlang OTP 17.0\nErlang OTP 08225797f7ef943d0c82a1d9dd6650d94ca2580d",
    "sourceHref": "",
    "cvss": {
        "score": 2.3,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/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": "OTP",
    "version": "3.0.1",
    "vendor": "Erlang",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}