CVE-2026-27480

{"id": "CVE-2026-27480", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2026-02-21T10:16:12.210", "references": [{"url": "https://github.com/static-web-server/static-web-server/commit/7bf0fd425eb10dac9bf9ef5febce12c4dd039ce1", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/static-web-server/static-web-server/security/advisories/GHSA-qhp6-635j-x7r2", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-204"}]}], "descriptions": [{"lang": "en", "value": "Static Web Server (SWS) is a production-ready web server suitable for static web files or assets. In versions 2.1.0 through 2.40.1, a timing-based username enumeration vulnerability in Basic Authentication allows attackers to identify valid users by exploiting early responses for invalid usernames, enabling targeted brute-force or credential-stuffing attacks. SWS checks whether a username exists before verifying the password, causing valid usernames to follow a slower code path (e.g., bcrypt hashing) while invalid usernames receive an immediate 401 response. This timing discrepancy allows attackers to enumerate valid accounts by measuring response-time differences. This issue has been fixed in version 2.41.0."}], "lastModified": "2026-02-24T16:55:37.307", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:static-web-server:static_web_server:*:*:*:*:*:rust:*:*", "vulnerable": true, "matchCriteriaId": "D0CB0D00-4F6E-4CBD-BC05-02533F489AE3", "versionEndExcluding": "2.41.0", "versionStartIncluding": "2.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}