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GHSA-jh67-hwqw-m5r7 — zrok

GHSA-jh67-hwqw-m5r7 is a Path Traversal vulnerability in zrok. No vendor fix is recorded yet; mitigation options are listed below.

rok Python ProxyShare can be used as an SSRF proxy through absolute URL paths

Also known asCVE-2026-45568PYSEC-2026-577
Published
May 19, 2026
Updated
Jun 29, 2026
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-jh67-hwqw-m5r7.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs44th percentile — riskier than 44% of all scored CVEsHighest risk
0.00%0.35%0.70%1.04%0.4%0.5%0.5%Aug 26Sep 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected
🐍zrok

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

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:

@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:

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.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPIzrok≥ 0.4.47No fix

Affected Products

1 product · 1 configurations
Application
zroknetfoundry
≥ 0.4.47 && < 2.0.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zrok, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    No patched version of zrok has shipped for GHSA-jh67-hwqw-m5r7 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

## 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(
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GHSA-jh67-hwqw-m5r7: zrok | O3 Security