{"schema_version":1,"title":"postcss (npm) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in postcss (npm): 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-73646, was published on 17 August 2026.","url":"https://junglewise.ai/threats/technologies/postcss","json_url":"https://junglewise.ai/threats/technologies/postcss.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/postcss","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":2,"all_time":5,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":3,"last_365_days":4},"latest":[{"cve":"CVE-2026-73646","cvss":7.5,"epss":0.0053,"slug":"cve-2026-73646-postcss-path-traversal-in-source-map-auto-loading","title":"PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior t","severity":"high","exploited":false,"published_at":"2026-08-17T16:17:47.257+00:00","url":"https://junglewise.ai/threats/cve-2026-73646-postcss-path-traversal-in-source-map-auto-loading"},{"cve":"CVE-2026-69153","cvss":4,"epss":0.0045,"slug":"cve-2026-69153-postcss-path-traversal-in-sourcemappingurl-parsing","title":"PostCSS path traversal in sourceMappingURL parsing","severity":"medium","exploited":false,"published_at":"2026-08-03T17:11:39+00:00","url":"https://junglewise.ai/threats/cve-2026-69153-postcss-path-traversal-in-sourcemappingurl-parsing"},{"cve":"CVE-2026-45623","cvss":7.5,"epss":0.0061,"slug":"cve-2026-45623-postcss-arbitrary-file-read-via-sourcemappingurl-path-traversal","title":"PostCSS arbitrary file read via sourceMappingURL path traversal","severity":"high","exploited":false,"published_at":"2026-07-27T18:16:55.13+00:00","url":"https://junglewise.ai/threats/cve-2026-45623-postcss-arbitrary-file-read-via-sourcemappingurl-path-traversal"},{"cve":"CVE-2026-41305","cvss":6.1,"epss":0.0026,"slug":"cve-2026-41305-postcss-has-xss-via-unescaped-style-in-its-css-stringify-output","title":"PostCSS has XSS via Unescaped </style> in its CSS Stringify Output","severity":"medium","exploited":false,"published_at":"2026-04-24T15:31:42+00:00","url":"https://junglewise.ai/threats/cve-2026-41305-postcss-has-xss-via-unescaped-style-in-its-css-stringify-output"},{"cve":"CVE-2023-44270","cvss":3.1,"epss":0.0082,"slug":"cve-2023-44270-postcss-line-return-parsing-error-in-css-tokenization","title":"PostCSS line return parsing error in CSS tokenization","severity":"low","exploited":false,"published_at":"2023-09-30T00:31:10+00:00","url":"https://junglewise.ai/threats/cve-2023-44270-postcss-line-return-parsing-error-in-css-tokenization"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"flowise (npm)","slug":"flowise","vulnerabilities":156,"url":"https://junglewise.ai/threats/technologies/flowise"},{"name":"vm2 (npm)","slug":"vm2","vulnerabilities":83,"url":"https://junglewise.ai/threats/technologies/vm2"},{"name":"@budibase/server (npm)","slug":"budibase-server","vulnerabilities":61,"url":"https://junglewise.ai/threats/technologies/budibase-server"},{"name":"directus (npm)","slug":"directus","vulnerabilities":60,"url":"https://junglewise.ai/threats/technologies/directus"},{"name":"nocodb (npm)","slug":"nocodb","vulnerabilities":55,"url":"https://junglewise.ai/threats/technologies/nocodb"},{"name":"hono (npm)","slug":"hono","vulnerabilities":54,"url":"https://junglewise.ai/threats/technologies/hono"},{"name":"parse-server (npm)","slug":"parse-server","vulnerabilities":42,"url":"https://junglewise.ai/threats/technologies/parse-server"},{"name":"dompurify (npm)","slug":"dompurify","vulnerabilities":39,"url":"https://junglewise.ai/threats/technologies/dompurify"},{"name":"ghost (npm)","slug":"ghost","vulnerabilities":39,"url":"https://junglewise.ai/threats/technologies/ghost"},{"name":"flowise-components (npm)","slug":"flowise-components","vulnerabilities":35,"url":"https://junglewise.ai/threats/technologies/flowise-components"},{"name":"astro (npm)","slug":"astro","vulnerabilities":30,"url":"https://junglewise.ai/threats/technologies/astro"},{"name":"@anthropic-ai/claude-code (npm)","slug":"anthropic-ai-claude-code","vulnerabilities":28,"url":"https://junglewise.ai/threats/technologies/anthropic-ai-claude-code"}],"technology":{"hub":true,"name":"postcss (npm)","slug":"postcss","vendor":{"name":"npm","slug":"npm","url":"https://junglewise.ai/threats/vendors/npm"},"aliases":[],"homepage":"https://postcss.org/","repo_url":"https://github.com/postcss/postcss","description":"A tool for transforming CSS with JavaScript plugins.","url":"https://junglewise.ai/threats/technologies/postcss"},"most_severe":[{"cve":"CVE-2026-45623","cvss":7.5,"epss":0.0061,"slug":"cve-2026-45623-postcss-arbitrary-file-read-via-sourcemappingurl-path-traversal","title":"PostCSS arbitrary file read via sourceMappingURL path traversal","severity":"high","exploited":false,"published_at":"2026-07-27T18:16:55.13+00:00","url":"https://junglewise.ai/threats/cve-2026-45623-postcss-arbitrary-file-read-via-sourcemappingurl-path-traversal"},{"cve":"CVE-2026-73646","cvss":7.5,"epss":0.0053,"slug":"cve-2026-73646-postcss-path-traversal-in-source-map-auto-loading","title":"PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior t","severity":"high","exploited":false,"published_at":"2026-08-17T16:17:47.257+00:00","url":"https://junglewise.ai/threats/cve-2026-73646-postcss-path-traversal-in-source-map-auto-loading"},{"cve":"CVE-2026-41305","cvss":6.1,"epss":0.0026,"slug":"cve-2026-41305-postcss-has-xss-via-unescaped-style-in-its-css-stringify-output","title":"PostCSS has XSS via Unescaped </style> in its CSS Stringify Output","severity":"medium","exploited":false,"published_at":"2026-04-24T15:31:42+00:00","url":"https://junglewise.ai/threats/cve-2026-41305-postcss-has-xss-via-unescaped-style-in-its-css-stringify-output"},{"cve":"CVE-2026-69153","cvss":4,"epss":0.0045,"slug":"cve-2026-69153-postcss-path-traversal-in-sourcemappingurl-parsing","title":"PostCSS path traversal in sourceMappingURL parsing","severity":"medium","exploited":false,"published_at":"2026-08-03T17:11:39+00:00","url":"https://junglewise.ai/threats/cve-2026-69153-postcss-path-traversal-in-sourcemappingurl-parsing"},{"cve":"CVE-2023-44270","cvss":3.1,"epss":0.0082,"slug":"cve-2023-44270-postcss-line-return-parsing-error-in-css-tokenization","title":"PostCSS line return parsing error in CSS tokenization","severity":"low","exploited":false,"published_at":"2023-09-30T00:31:10+00:00","url":"https://junglewise.ai/threats/cve-2023-44270-postcss-line-return-parsing-error-in-css-tokenization"}],"generated_at":"2026-09-27T03:07:00.185062+00:00"}