GHSA-CRP9-R7RQ-C8CG高危已审查已撤回

Duplicate Advisory: pathsec SSRF protection can be bypassed when a proxy is configured

OSV 1.4.0 · github-reviewed · 修改于 2026-09-02 22:40

发布时间

2026-08-25 11:32

GitHub 审查时间

2026-09-02 22:40

NVD 发布时间

2026-08-25 10:16

源文件

advisories/github-reviewed/2026/08/GHSA-crp9-r7rq-c8cg/GHSA-crp9-r7rq-c8cg.json

该公告已于 2026-09-02 22:40 撤回

内容仅用于保留外部引用，请不要将其当作仍然有效的安全结论。

公告说明

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-6ww7-3frv-cqxh. This link is maintained to preserve external references.

Original Description

NLTK before 3.10.3 contains a server-side request forgery vulnerability in nltk.pathsec.urlopen (and callers nltk.data.load, nltk.downloader.Downloader.index/download) when an HTTP proxy is configured. pathsec.urlopen validates the requested hostname locally, but proxy-handler inheritance disables the safe HTTP/HTTPS handlers so the actual fetch is performed by the proxy against a destination that is never re-validated. An attacker can supply a validated public URL that the proxy forwards to an internal loopback-only service, allowing disclosure of internal HTTP resources, loading of forged downloader indexes, and installation of attacker-chosen package content.

受影响的软件包

PyPI

nltk

ECOSYSTEM

标识信息

别名 / CVE

无

CWE

CWE-918

软件生态

PyPI

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS_V4

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

原始 OSV JSON

{
  "id": "GHSA-crp9-r7rq-c8cg",
  "aliases": [],
  "details": "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-6ww7-3frv-cqxh. This link is maintained to preserve external references.\n\n## Original Description\nNLTK before 3.10.3 contains a server-side request forgery vulnerability in nltk.pathsec.urlopen (and callers nltk.data.load, nltk.downloader.Downloader.index/download) when an HTTP proxy is configured. pathsec.urlopen validates the requested hostname locally, but proxy-handler inheritance disables the safe HTTP/HTTPS handlers so the actual fetch is performed by the proxy against a destination that is never re-validated. An attacker can supply a validated public URL that the proxy forwards to an internal loopback-only service, allowing disclosure of internal HTTP resources, loading of forged downloader indexes, and installation of attacker-chosen package content.",
  "summary": "Duplicate Advisory: pathsec SSRF protection can be bypassed when a proxy is configured",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3.10.2"
            }
          ]
        }
      ],
      "package": {
        "name": "nltk",
        "ecosystem": "PyPI"
      }
    }
  ],
  "modified": "2026-09-02T14:40:01Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
    },
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
    }
  ],
  "published": "2026-08-25T03:32:11Z",
  "withdrawn": "2026-09-02T14:40:01Z",
  "references": [
    {
      "url": "https://github.com/nltk/nltk/security/advisories/GHSA-6ww7-3frv-cqxh",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78682",
      "type": "ADVISORY"
    },
    {
      "url": "https://www.vulncheck.com/advisories/nltk-before-ssrf-protection-bypass-via-proxy",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "nvd_published_at": "2026-08-25T02:16:52Z",
    "github_reviewed_at": "2026-09-02T14:40:01Z"
  }
}