{"metadata": {"vulnerability": "CVE-2026-66062", "count": 12, "kinds": {"milestone": 4, "sighting": 1, "kev": 0, "other": 7}}, "data": [{"timestamp": "2026-07-23T23:25:28.896Z", "date_only": false, "value": "2026-07-23T23:25:28.896Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-66062", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-08-07T16:49:43.853Z", "date_only": false, "value": "2026-08-07T16:49:43.853Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-66062", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-08-07T16:49:43.853Z", "date_only": false, "value": "2026-08-07T16:49:43.853Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / GitHub_M", "record": "CVE-2026-66062", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-08-07T16:50:02Z", "date_only": false, "value": "2026-08-07T16:50:02Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-29G2-3RMR-QM68", "record": "GHSA-29G2-3RMR-QM68", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-08-07T16:50:02Z", "date_only": false, "value": "2026-08-07T16:50:02Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-29G2-3RMR-QM68", "record": "GHSA-29G2-3RMR-QM68", "field": "modified"}, {"timestamp": "2026-08-07T17:17:06.340Z", "date_only": false, "value": "2026-08-07T17:17:06.340", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-66062", "record": "FKIE_CVE-2026-66062", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-08-07T20:58:04.458Z", "date_only": false, "value": "2026-08-07T20:58:04.458547Z", "kind": "other", "label": "Recorded", "source": "cvelistv5 / CISA-ADP", "record": "CVE-2026-66062", "field": "containers.adp.0.metrics.0.other.content.timestamp"}, {"timestamp": "2026-08-07T20:58:04.458Z", "date_only": false, "value": "2026-08-07T20:58:04.458547Z", "kind": "other", "label": "Recorded", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-66062", "record": "FKIE_CVE-2026-66062", "field": "metrics.ssvcV203.0.ssvcData.timestamp"}, {"timestamp": "2026-08-07T21:02:12.997Z", "date_only": false, "value": "2026-08-07T21:02:12.997Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-66062", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-08-07T21:02:12.997Z", "date_only": false, "value": "2026-08-07T21:02:12.997Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / CISA-ADP", "record": "CVE-2026-66062", "field": "containers.adp.0.providerMetadata.dateUpdated"}, {"timestamp": "2026-08-08T08:31:57.841Z", "date_only": false, "value": "2026-08-08T08:31:57.841681Z", "kind": "sighting", "label": "Seen", "source": "https://gist.github.com/alon710/47ff7eb96677e04e1cb388be69ae9049", "record": "CVE-2026-66062", "field": "creation_timestamp", "uuid": "d26021ca-8c0d-45dc-97b3-43a15b4959ce", "content": "# CVE-2026-66062: CVE-2026-66062: Regular Expression Denial of Service (ReDoS) in SvelteKit Content Negotiation\n\n> **CVSS Score:** 5.3\n> **Published:** 2026-08-07\n> **Full Report:** https://cvereports.com/reports/CVE-2026-66062\n\n## Summary\nA Regular Expression Denial of Service (ReDoS) vulnerability exists in SvelteKit's content negotiation header parser prior to version 2.70.2. An unauthenticated remote attacker can exploit this vulnerability by sending a crafted Accept header with highly repetitive malformed values. This triggers catastrophic backtracking on the single-threaded Node.js/Bun event loop, leading to CPU exhaustion and full denial of service.\n\n## TL;DR\nSvelteKit versions before 2.70.2 are vulnerable to a CPU-exhausting ReDoS via malformed Accept headers due to an unanchored regular expression in its content negotiation parser.\n\n## Technical Details\n\n- **CWE ID**: CWE-1333 (Inefficient Regular Expression Complexity)\n- **Attack Vector**: Network (AV:N)\n- **CVSS**: 5.3 (Medium)\n- **EPSS**: N/A\n- **Impact**: Denial of Service (DoS)\n- **Exploit Status**: PoC Available\n- **KEV Status**: Not Listed\n\n## Affected Systems\n\n- SvelteKit Server Applications\n- Node.js execution environments running @sveltejs/kit\n- Bun execution environments running @sveltejs/kit\n- **@sveltejs/kit**: < 2.70.2 (Fixed in: `2.70.2`)\n\n## Mitigation\n\n- Upgrade to @sveltejs/kit version 2.70.2 or later\n- Enforce strict HTTP header size limit in reverse proxies\n- Deploy WAF rules to reject Accept headers without forward slashes\n\n**Remediation Steps:**\n1. Open your project's package.json file\n2. Update the @sveltejs/kit dependency to ^2.70.2\n3. Run your package manager's installation command (e.g., npm install or pnpm install) to update lockfiles\n4. Deploy the updated code to production environments\n\n## References\n\n- [GitHub Security Advisory GHSA-29g2-3rmr-qm68](https://github.com/sveltejs/kit/security/advisories/GHSA-29g2-3rmr-qm68)\n- [SvelteKit Fix Commit 82712fc02c24b1dcf5b25d7a52129cd8455f04f5](https://github.com/sveltejs/kit/commit/82712fc02c24b1dcf5b25d7a52129cd8455f04f5)\n- [NVD Entry for CVE-2026-66062](https://nvd.nist.gov/vuln/detail/CVE-2026-66062)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-66062) - Automated Vulnerability Intelligence*", "url": "https://gist.github.com/alon710/47ff7eb96677e04e1cb388be69ae9049"}, {"timestamp": "2026-10-24T16:10:00.153Z", "date_only": false, "value": "2026-10-24T16:10:00.153", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-66062", "record": "FKIE_CVE-2026-66062", "field": "lastModified"}], "metrics": {"as_of": "2026-10-28T12:28:56.995Z", "anchors": {"origin": {"timestamp": "2026-08-07T16:49:43.853Z", "date_only": false, "value": "2026-08-07T16:49:43.853Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-66062", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, "discovery": null, "report": null, "acknowledgement": null, "disclosure": {"timestamp": "2026-08-07T16:49:43.853Z", "date_only": false, "value": "2026-08-07T16:49:43.853Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-66062", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, "exploit_publication": null, "exploitation": null, "patch": null}, "vendor_response_time": {"available": false, "missing": ["start", "end"]}, "time_to_exploit": {"available": false, "missing": ["end"]}, "disclosure_to_exploit": {"available": false, "missing": ["end"]}, "disclosure_to_exploit_publication": {"available": false, "missing": ["end"]}, "time_to_patch": {"available": false, "missing": ["start", "end"]}, "total_time_to_patch": {"available": false, "missing": ["start", "end"]}, "disclosure_to_patch": {"available": false, "missing": ["end"]}, "time_unpatched": {"available": true, "seconds": 7069153.142135, "hours": 1963.6536505930555, "days": 81.81890210804399, "min_seconds": 7069153.142135, "max_seconds": 7069153.142135, "approximate": false, "ongoing": true, "order_known": true, "batch_listing": false, "end_before_start": false, "start": {"timestamp": "2026-08-07T16:49:43.853Z", "date_only": false, "value": "2026-08-07T16:49:43.853Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-66062", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, "end": {"timestamp": "2026-10-28T12:28:56.995Z", "date_only": false, "label": "As of", "source": "Calculation clock"}}, "exploitation_to_patch": {"available": false, "missing": ["start"]}, "exploit_publication_to_patch": {"available": false, "missing": ["start"]}}}