{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93421","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-17T20:57:18.984Z","datePublished":"2026-09-23T18:59:52.637Z","dateUpdated":"2026-09-23T19:41:34.966Z"},"containers":{"cna":{"title":"Mesop: Unauthenticated ANSI Escape Sequence Injection in CSP Reporting Endpoint","problemTypes":[{"descriptions":[{"cweId":"CWE-117","lang":"en","description":"CWE-117: Improper Output Neutralization for Logs","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-150","lang":"en","description":"CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph"},{"name":"https://github.com/mesop-dev/mesop/pull/1397","tags":["x_refsource_MISC"],"url":"https://github.com/mesop-dev/mesop/pull/1397"},{"name":"https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785","tags":["x_refsource_MISC"],"url":"https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785"},{"name":"https://github.com/mesop-dev/mesop/releases/tag/v1.3.4","tags":["x_refsource_MISC"],"url":"https://github.com/mesop-dev/mesop/releases/tag/v1.3.4"}],"affected":[{"vendor":"mesop-dev","product":"mesop","versions":[{"version":"< 1.3.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-23T18:59:52.637Z"},"descriptions":[{"lang":"en","value":"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 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."}],"source":{"advisory":"GHSA-g7f6-rxc4-qhph","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T19:25:37.624256Z","id":"CVE-2026-93421","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-23T19:41:34.966Z"}}]}}