{"cve":{"cve_id":"CVE-2026-6104","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00469,"epss_percentile":0.38592,"epss_as_of":"2026-08-26","description":"In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL byte is passed to mb_convert_encoding() or related mbstring functions, the code incorrectly assumes that when strncasecmp() returns 0 it means the strings have the same length. This can lead to out-of-bounds read of global memory, potentially causing a crash or information disclosure or crash. Affected functions include mb_convert_encoding(), mb_detect_encoding(), mb_convert_variables(), and mb_detect_order(), as well as the mbstring.detect_order and mbstring.http_output INI settings.","published_at":"2026-05-10T04:35:17.328000Z","last_modified_at":"2026-07-24T08:10:00.150000Z","cvss_v3_score":8.2,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":6.3,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:L/SI:N/SA:L/RE:M/U:Amber","cvss_v4_severity":"MEDIUM","ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-125"],"nvd_references":["https://github.com/php/php-src/security/advisories/GHSA-74r9-qxhc-fx53"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-07-25T12:00:38.384267Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"P","value_label":"Present"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User 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System)","value":"L","value_label":"Low"},{"metric":"RE","name":"RE","value":"M","value_label":"M"},{"metric":"U","name":"U","value":"Amber","value_label":"Amber"}]},"affected":[{"vendor_slug":"php","vendor_name":"php","product_slug":"php","product_name":"php","version_start":"8.4.0","version_start_inclusive":true,"version_end":"8.4.21","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"},{"vendor_slug":"php-group","vendor_name":"PHP Group","product_slug":"php","product_name":"PHP","version_start":"8.4.*","version_start_inclusive":true,"version_end":"8.4.21","version_end_inclusive":false,"cpe23_uri":"cve5:php-group:php:8.4.*:8.4.21"},{"vendor_slug":"php-group","vendor_name":"PHP Group","product_slug":"php","product_name":"PHP","version_start":"8.5.*","version_start_inclusive":true,"version_end":"8.5.6","version_end_inclusive":false,"cpe23_uri":"cve5:php-group:php:8.5.*:8.5.6"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/php/php-src/security/advisories/GHSA-74r9-qxhc-fx53","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-05-10T04:35:17.328000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:56:01.087206Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:56:01.087206Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:56:01.087206Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC 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