What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-09-09
• Weakness: CWE-306

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.

Affected products

• static-web-server: before 2.44.0

References

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

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