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CVE-2026-48855

Full vulnerability record from the local CVENow database.

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery. The 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 /. The 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. This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl. This issue affects OTP from OTP 17.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP 17.0, corresponding to ssh before 3.0.1, is affected is unknown.

Severity
LOW
CVSS score
2.3 (v4.0)
Vulnerability status
Modified
Source identifier
6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Published
2026-06-10 16:17:09.680000
Last modified
2026-10-25 23:10:00.167000
View original CVE JSON 
{
  "id": "CVE-2026-48855",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "published": "2026-06-10T16:17:09.680",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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 OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP 17.0, corresponding to ssh before 3.0.1, is affected is unknown."
    },
    {
      "lang": "es",
      "value": "La vulnerabilidad de Exposición de Información Sensible a un Actor No Autorizado en Erlang OTP ssh (módulo ssh_sftpd) permite el Descubrimiento de Archivos.\n\nEl gestor SSH_FXP_READLINK en ssh_sftpd envía el resultado en bruto de file:read_link/2 al cliente sin llamar a chroot_filename/2 para eliminar el prefijo de la raíz del backend. Un cliente SFTP autenticado puede crear un enlace simbólico dentro del chroot apuntando a /; ssh_sftpd resuelve el objetivo a la raíz absoluta del backend y lo almacena en disco. Leer el enlace simbólico de vuelta a través de SSH_FXP_READLINK devuelve esa ruta absoluta, por ejemplo /data/sftp, en lugar del valor chrooted /.\n\nLa información divulgada es la ruta absoluta del sistema de archivos del directorio raíz SFTP y de cualquier objetivo de enlace simbólico dentro de él. No se pueden obtener contenidos de archivos, credenciales o acceso a rutas fuera del directorio raíz a través de este problema solamente.\n\nEsta vulnerabilidad está asociada con los archivos de programa lib/ssh/src/ssh_sftpd.erl.\n\nEste problema afecta a OTP desde OTP 17.0 antes de 29.0.2, 28.5.0.2 y 27.3.4.13 correspondiente a ssh desde 3.0.1 antes de 6.0.1, 5.5.2.1 y 5.2.11.8."
    }
  ],
  "affected": [
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      "affectedData": [
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          "product": "OTP",
          "defaultStatus": "unknown",
          "packageName": "otp",
          "cpes": [
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          "modules": [
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          "packageURL": "pkg:software-id/erlang.org/otp",
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                  "status": "unaffected"
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          "repo": "https://github.com/erlang/otp",
          "packageURL": "pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
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          "repo": "https://github.com/erlang/otp",
          "packageURL": "pkg:github/erlang/otp",
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              "lessThan": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6",
              "versionType": "git",
              "status": "affected"
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            {
              "version": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6",
              "lessThan": "*",
              "versionType": "git",
              "status": "unaffected"
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    }
  ],
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          "attackRequirements": "PRESENT",
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          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "availabilityImpact": "NONE"
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    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "id": "CVE-2026-48855",
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              "exploitation": "none"
            },
            {
              "automatable": "no"
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              "technicalImpact": "partial"
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          "role": "CISA Coordinator",
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  "weaknesses": [
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
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  "configurations": [
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      "nodes": [
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          "negate": false,
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      "url": "https://cna.erlef.org/cves/CVE-2026-48855.html",
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}