CVE-2026-45568: Zrok Rok Python ProxyShare Can Be Vulnerability

CRITICAL
Advisory Identifier: GHSA-jh67-hwqw-m5r7
Share
CWE-22
Published
Advisory Summary

CVE-2026-45568 is a CRITICAL rok python proxyshare can be vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Zrok libraries in the PyPI ecosystem. The issue involves rok python proxyshare can be used as an ssrf proxy through absolute url paths. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45568 at a Glance

CVE Identifier CVE-2026-45568
GHSA Identifier GHSA-jh67-hwqw-m5r7
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Zrok
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2026-45568

To remediate this vulnerability, upgrade all affected Zrok dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

zrok fixed: Latest secure release 
pip install zrok>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show zrok

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-45568, inspect your installed packages using pip:

pip show zrok

Analyze the terminal output to locate any version of Zrok in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show zrok command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Zrok, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary Alice exposes a Python SDK `ProxyShare` with a fixed target URL. Bob sends a request to the share with an absolute URL in the path. The Flask handler passes that path to `urllib.parse.urljoin`, which replaces Alice's configured target host with Bob's host and returns the server-side response to Bob. ## Details The Python SDK proxy route accepts every path under the share: ```python @app.route('/', defaults={'path': ''}, methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS']) @app.route('/<path:path>', methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS']) def proxy(path): ``` It constructs the outbound URL with `urljoin` and then sends the request: ```python url = urllib.parse.urljoin(self.target, path) resp = requests.request( method=request.method, url=url, headers={key: value for (key, value) in request.headers if key.lower() not in HOP_BY_HOP_HEADERS}, data=request.get_data(), cookies=request.cookies, allow_redirects=False, stream=True, verify=self.verify_ssl ) ``` When `path` is `[http://127.0.0.1:19190/metadata`](http://127.0.0.1:19190/metadata%60), `urljoin(self.target, path)` returns `[http://127.0.0.1:19190/metadata`](http://127.0.0.1:19190/metadata%60). The proxy sends the request to Bob's chosen URL rather than Alice's target.

CVE-2026-45568 Affected Zrok Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
zrok
pypi/zrok
PyPI
≥ 0.4.47
≤ 1.1.11

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openziti/zrok/security/advisories/GHSA-jh67-hwqw-m5r7
Zrok Source Repository REPOSITORY
https://github.com/openziti/zrok

Frequently Asked Questions

What is CVE-2026-45568?
CVE-2026-45568 is a security vulnerability in Zrok involving rok Python ProxyShare can be used as an SSRF proxy through absolute URL paths under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Zrok versions are affected?
Affected versions include releases prior to current release patches across affected packages: zrok.
What version fixes CVE-2026-45568?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is zrok affected?
Yes, zrok is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2026-45568?
CVE-2026-45568 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2026-45568?
Run the dependency tree command: 'pip show zrok'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jh67-hwqw-m5r7",
  "modified" : "2026-05-19T15:16:08Z",
  "published" : "2026-05-19T15:16:08Z",
  "aliases" : [ "CVE-2026-45568" ],
  "summary" : "rok Python ProxyShare can be used as an SSRF proxy through absolute URL paths",
  "details" : "## Summary\n\nAlice exposes a Python SDK `ProxyShare` with a fixed target URL. Bob sends a request to the share with an absolute URL in the path. The Flask handler passes that path to `urllib.parse.urljoin`, which replaces Alice's configured target host with Bob's host and returns the server-side response to Bob.\n\n## Details\n\nThe Python SDK proxy route accepts every path under the share:\n\n```python\n@app.route('/', defaults={'path': ''}, methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'])\n@app.route('/<path:path>', methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'])\ndef proxy(path):\n```\n\nIt constructs the outbound URL with `urljoin` and then sends the request:\n\n```python\nurl = urllib.parse.urljoin(self.target, path)\nresp = requests.request(\n    method=request.method,\n    url=url,\n    headers={key: value for (key, value) in request.headers\n             if key.lower() not in HOP_BY_HOP_HEADERS},\n    data=request.get_data(),\n    cookies=request.cookies,\n    allow_redirects=False,\n    stream=True,\n    verify=self.verify_ssl\n)\n```\n\nWhen `path` is `[http://127.0.0.1:19190/metadata`](http://127.0.0.1:19190/metadata%60), `urljoin(self.target, path)` returns `[http://127.0.0.1:19190/metadata`](http://127.0.0.1:19190/metadata%60). The proxy sends the request to Bob's chosen URL rather than Alice's target.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "zrok"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.4.47"
      }, {
        "last_affected" : "1.1.11"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openziti/zrok/security/advisories/GHSA-jh67-hwqw-m5r7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openziti/zrok"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-19T15:16:08Z",
    "nvd_published_at" : null
  }
}