https://vulnerability.circl.lu/sightings/feed 2026-08-23T23:14:51.996370+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent sightings. https://vulnerability.circl.lu/sighting/7d309b34-0a3c-4298-a1e5-edcf80942dd7/export 2026-08-23T23:14:52.022114+00:00 Automation user https://vulnerability.circl.lu/user/automation {"uuid": "7d309b34-0a3c-4298-a1e5-edcf80942dd7", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-63466", "type": "seen", "source": "https://gist.github.com/alon710/2b3f0356900578390c8450f33458882e", "content": "# CVE-2026-63466: CVE-2026-63466: Process-Wide Security Degradation via Global Module Mutation in Unleash\n\n> **CVSS Score:** 4.1\n> **Published:** 2026-08-21\n> **Full Report:** https://cvereports.com/reports/CVE-2026-63466\n\n## Summary\nPrior to version 8.0.3, Unleash's Markdown event formatter directly mutated the global template-escaping function of the shared mustache Node.js module, resulting in a process-wide security degradation where HTML/Markdown escaping was permanently disabled for the application lifetime.\n\n## TL;DR\nUnleash mutated a global mustache instance, permanently disabling HTML escaping process-wide after any markdown formatting event.\n\n## Technical Details\n\n- **CWE ID**: CWE-116 / CWE-1188\n- **Attack Vector**: Network\n- **CVSS Score**: 4.1\n- **EPSS Score**: N/A\n- **Impact**: Process-wide HTML/Markdown escaping bypass\n- **Exploit Status**: None\n- **KEV Status**: Not Listed\n\n## Affected Systems\n\n- Unleash Core Server\n- Unleash Enterprise Backend\n- **Unleash Core & Enterprise Backend**: < 8.0.3 (Fixed in: `8.0.3`)\n\n## Mitigation\n\n- Upgrade Unleash instances to version 8.0.3 or higher.\n- Implement boundary input validation on user-configurable fields like names and emails.\n\n**Remediation Steps:**\n1. Identify current Unleash version in deployment package.json or container tags.\n2. Update the Unleash package to v8.0.3 or pull Docker tag 'unleash-org/unleash:8.0.3'.\n3. Deploy the updated codebase and trigger a full restart of all Unleash server processes.\n4. Verify that custom username attributes containing markdown format characters are properly escaped in test alert channels.\n\n## References\n\n- [GitHub Security Advisory GHSA-w4mq-xh27-6xpx](https://github.com/Unleash/unleash/security/advisories/GHSA-w4mq-xh27-6xpx)\n- [Unleash Fix Commit](https://github.com/Unleash/unleash/commit/002012cfdbedd2e9b7db9dc83b9f549f761db22e)\n- [Unleash v8.0.3 Release Notes](https://github.com/Unleash/unleash/releases/tag/v8.0.3)\n- [NVD - CVE-2026-63466](https://nvd.nist.gov/vuln/detail/CVE-2026-63466)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-63466) - Automated Vulnerability Intelligence*", "creation_timestamp": "2026-08-22T10:31:15.313872Z"} 2026-08-22T10:31:15.313872+00:00