{"schema":"threatline.record/2","record":{"id":"CVE-2026-104454","aliases":["GHSA-gf57-wg5m-h34q"],"summary":"YesWiki before 4.6.7 ReDoS via wakka.php Edit-Preview Endpoint","details":"YesWiki before 4.6.7 contains an algorithmic-complexity denial of service in the wakka.php formatter due to an O(n^2) markdown-link regex. Unauthenticated attackers can submit a small crafted body of bracket characters to the page-edit preview endpoint to pin PHP-FPM workers and saturate the pool.","categories":["Unclassified"],"product":"yeswiki","vendor":"YesWiki","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104454","source_modified_at":"2026-10-02T14:50:11.572Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"yeswiki","vendor":"YesWiki","versions":[{"lessThan":"4.6.7","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"4.6.7","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"GitHub Advisory Database","source_url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-gf57-wg5m-h34q","source_modified_at":"2026-10-07T21:42:05Z","fetched_at":"2026-10-24T10:48:42.330819Z","package":{"ecosystem":"composer","name":"yeswiki/yeswiki"},"range":"<= 4.6.6"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104454","source_modified_at":"2026-10-02T14:50:11.572Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"yeswiki","ecosystem":null},"version":"4.6.7","basis":"first unaffected version stated in the CVE record"},{"source":"GitHub Advisory Database","source_url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-gf57-wg5m-h34q","source_modified_at":"2026-10-07T21:42:05Z","fetched_at":"2026-10-24T10:48:42.330819Z","package":{"ecosystem":"composer","name":"yeswiki/yeswiki"},"version":"4.6.7"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00401,"percentile":0.33258,"score_date":"2026-10-23"},"published_at":"2026-10-02T11:38:25.069Z","modified_at":"2026-10-07T21:42:05Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104454","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T14:50:11.572Z"},{"source":"GitHub Advisory Database","url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-gf57-wg5m-h34q","fetched_at":"2026-10-24T10:48:42.330819Z","source_modified_at":"2026-10-07T21:42:05Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104454","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-gf57-wg5m-h34q","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-redos-via-wakka-php-edit-preview-endpoint","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-02T14:47:46.223756Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-07T21:42:05Z","content_hash":"22defc7432e90010a6c303345bf0e29565144e9b819232a1a687d0bc3d0bd344"}}