{"id":"CVE-2026-93421","title":"Mesop is a Python-based UI framework that allows users to build web applications","summary":"Mesop is a Python-based UI framework that allows users to build web applications. Prior to 1.3.4, the unauthenticated /__csp__ endpoint passes attacker-controlled document-uri, blocked-uri, and violated-directive values to the csp_report…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","cwe":["CWE-117","CWE-150"],"vendor":"mesop-dev","product":"mesop","affected":["mesop < 1.3.4"],"patched":["mesop 1.3.4"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T20:17:22.503","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93421","references":[{"url":"https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785","label":"security-advisories@github.com"},{"url":"https://github.com/mesop-dev/mesop/pull/1397","label":"security-advisories@github.com"},{"url":"https://github.com/mesop-dev/mesop/releases/tag/v1.3.4","label":"security-advisories@github.com"},{"url":"https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-g7f6-rxc4-qhph"},{"url":"https://github.com/mesop-dev/mesop"}],"tags":["nvd","cve.org","ghsa","pip","osv"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-23T19:25:37.624256Z"},"cvssSource":"cna","aliases":["GHSA-g7f6-rxc4-qhph"],"ecosystem":"pip","ingestedAt":"2026-09-23T19:31:04.473Z","epss":0.00404,"epssPercentile":0.31921,"slug":"CVE-2026-93421","body":"## Overview\n\nMesop is a Python-based UI framework that allows users to build web applications. Prior to 1.3.4, the unauthenticated /__csp__ endpoint passes attacker-controlled document-uri, blocked-uri, and violated-directive values to the csp_report handler in mesop/server/static_file_serving.py, which prints them to standard output without neutralizing terminal control sequences. When an operator views the resulting logs in an ANSI-capable terminal, injected ANSI or VT100 sequences can clear or reposition the display, hide text, or present forged messages, reducing the integrity of monitoring and incident-response output. This issue is fixed in version 1.3.4.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-93421)\n\nAffected packages:\n\n- `mesop <= 1.3.3`\n\nPatched in:\n\n- `mesop 1.3.4`\n\nSource: https://github.com/advisories/GHSA-g7f6-rxc4-qhph","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}