CVE-2026-45568 — zrok
Fix: openziti/zrok@7c1dc3eCVE-2026-45568 is a Path Traversal vulnerability in zrok. No vendor fix is recorded yet; mitigation options are listed below.
zrok Python ProxyShare can be used as an SSRF proxy through absolute URL paths
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 CVE-2026-45568.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
Real-World Exposure
zrokReal-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
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | zrok | ≥ 0.4.47 | No fix |
Affected Products
zroknetfoundryDetection & mitigation playbook
Open-source dependencyDetect
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.
Remediation status
No patched version of zrok has shipped for CVE-2026-45568 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
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
Is CVE-2026-45568 in your dependencies?
Find it across PyPI, including transitive dependencies.