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Critical, CVSS 9.9amended

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

CVE-2026-45568GHSA-jh67-hwqw-m5r7

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI zrok

    Affected
    >= 0.4.47, <= 1.1.11
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.9 · 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 · score source
EPSS
  • CVE-2026-45568: 0.54% estimated exploitation activity in the next 30 days; percentile 45.72 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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: It constructs the outbound URL with urljoin and then sends the request: When path is http://127.0.0.1:19190/metadata, urljoin(self.target, path) returns http://127.0.0.1:19190/metadata. The proxy sends the request to Bob's chosen URL rather than Alice's target.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 4 · amended ·

    Amended from ghsa record GHSA-jh67-hwqw-m5r7

  2. Revision 3 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 2 · amended ·

    Amended from osv record GHSA-jh67-hwqw-m5r7

  4. Revision 1 · created ·

    Published from ghsa record GHSA-jh67-hwqw-m5r7

Agent brief

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# Patch Next advisory brief: CVE-2026-45568

Advisory: rok Python ProxyShare can be used as an SSRF proxy through absolute URL paths
IDs: CVE-2026-45568, GHSA-jh67-hwqw-m5r7
Record: https://patchnext.com/advisories/cve-2026-45568 (revision 4, source checked 26 Oct 2026, 13:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI zrok: affected >= 0.4.47, <= 1.1.11

## Suggested inspection (read-only)
- `python -m pip show zrok`: prints the installed version. Run with the environment that serves production active.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on zrok.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-jh67-hwqw-m5r7 (GitHub-reviewed advisory GHSA-jh67-hwqw-m5r7 lists affected ranges: PyPI zrok >=0.4.47 <=1.1.11)
- Verified: https://osv.dev/vulnerability/GHSA-jh67-hwqw-m5r7 (OSV record GHSA-jh67-hwqw-m5r7 lists affected ranges: PyPI zrok >=0.4.47 <=1.1.11)

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