# CVE-2026-102337: Webmin: SSRF exploit in Upload and Download and File Manager modules

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

Webmin is a web-based system administration tool for Unix-like servers. Prior to 2.652, untrusted users with access to the File Manager or Upload and Download modules can direct Webmin's server-side URL download functionality to non-public network addresses because download destinations are not restricted by resolved IP address. This allows requests to unauthenticated intranet services or cloud-provider instance metadata endpoints that are inaccessible from the user's own system. This issue is fixed in 2.652.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- webmin / webmin: < 2.652 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 4.0: 4.9 (medium); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N; source: CNA: GitHub_M

- CVSS 4.0: 4.9 (medium); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/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; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-918

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/webmin/webmin/security/advisories/GHSA-x8qr-rx2g-f23g (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/webmin/webmin/pull/2789 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/webmin/webmin/commit/5b6b43ac3d09ff582c1fa89d9589324f02320c42 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/webmin/webmin/commit/e805319233c5a6837e97b35a329c6bb2cad82657 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/webmin/webmin/commit/f62fd9e23adc9dc7c65ff75b31d10ae3e7eadc90 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/webmin/webmin/releases/tag/2.652 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/webmin/webmin/commit/5b6b43ac3d09ff582c1fa89d9589324f02320c42 (security-advisories@github.com)

- https://github.com/webmin/webmin/commit/e805319233c5a6837e97b35a329c6bb2cad82657 (security-advisories@github.com)

- https://github.com/webmin/webmin/commit/f62fd9e23adc9dc7c65ff75b31d10ae3e7eadc90 (security-advisories@github.com)

- https://github.com/webmin/webmin/pull/2789 (security-advisories@github.com)

- https://github.com/webmin/webmin/releases/tag/2.652 (security-advisories@github.com)

- https://github.com/webmin/webmin/security/advisories/GHSA-x8qr-rx2g-f23g (security-advisories@github.com)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-102337; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-102337; retrieved 2026-11-05; source updated 2026-11-04

Revision: e9ecfccb43ca56f98fec903800e6c86631dd76ab9cdb4fda12fde2c9379428f8

Canonical: https://y2.dev/cve/CVE-2026-102337

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.