CVE-2026-75601 static-web-server CVE debrief

Who should care

Defenders responsible for Static Web Server instances, particularly those with both basic-auth and metrics features enabled, should assess exposure and prioritize verification and remediation efforts.

Why it matters

CVE-2026-75601 allows unauthenticated remote attackers to retrieve sensitive Prometheus metrics from Static Web Server instances with both basic-auth and metrics features enabled. Defenders should prioritize verifying exposure, assessing impact, and remediating vulnerable instances to prevent potential unauthorized access to sensitive information.

• Potential unauthorized access to sensitive metrics.
• Possible disclosure of virtual host names, request volumes, error rates, latency distributions, and active connections.
• Need to verify exposure of vulnerable Static Web Server instances.
• Prioritization of remediation efforts for instances with both basic-auth and metrics features enabled.

Technical summary

Static Web Server (SWS) versions through 2.43.0 with both basic-auth and metrics features enabled process the /metrics endpoint before the basic-auth check, 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. The vulnerability has a CVSS score of 4.3 and a severity of MEDIUM. The CVE record and NVD entry provide details on the vulnerability in Static Web Server (SWS) versions through 2.43.0, allowing unauthenticated remote attackers to retrieve Prometheus metrics.

Defensive priority

Defenders should prioritize verifying exposure of Static Web Server instances with both basic-auth and metrics features enabled, and assess the impact of potential unauthorized access to Prometheus metrics.

Recommended defensive actions

• Verify if Static Web Server instances with both basic-auth and metrics features enabled are present in the environment.
• Assess the impact of potential unauthorized access to Prometheus metrics.
• Update to version 2.44.0 or later if vulnerable.
• Monitor for unusual activity related to the /metrics endpoint.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Static Web Server (SWS) versions through 2.43.0, allowing unauthenticated remote attackers to retrieve Prometheus metrics. The issue is fixed in version 2.44.0.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.