{"id":"CVE-2026-128025","kind":"vulnerability","aliases":["CVE-2026-128025"],"related":[],"title":"FrankenPHP: path-split bug lets requests run protected PHP scripts","description":"FrankenPHP before 1.13.0 contains a path-split interpretation conflict in splitPos in cgi.go that allows unauthenticated attackers to execute protected PHP scripts by embedding .php inside a filename component. Attackers can request paths like /uploads/a.php.txt/b.php to execute uploads/a.php despite route-level or WAF deny rules and forge PATH_INFO, SCRIPT_NAME, and PHP_SELF values.","summary":"FrankenPHP before 1.13.0 splits request paths in a way that can differ from how routing and WAF rules read them. An unauthenticated attacker can request a path such as /uploads/a.php.txt/b.php to run a PHP script that deny rules were meant to block.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["frankenphp","php","runtime","self-hosted","waf"],"not_affected_if":["frankenphp-1.13.0-or-later","no-php-uploads"],"how_to_check":"- Check the FrankenPHP version with `frankenphp version` or the version in your build or container image.\n- Look for upload or user-content directories that serve PHP files, and for route or WAF rules that block PHP paths.","fix":"- FrankenPHP: move to `1.13.0` or later.","status":"open","published_at":"2026-11-13T10:18:08+00:00","first_seen_at":"2026-11-13T10:47:31+00:00","triaged_at":"2026-11-13T10:54:36+00:00","updated_at":"2026-11-13T10:54:36+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-13T10:54:36Z","model":"claude-haiku-5-5","output":{"fix":"- FrankenPHP: move to `1.13.0` or later.","reach":"internet","title":"FrankenPHP: path-split bug lets requests run protected PHP scripts","impact":"high","summary":"FrankenPHP before 1.13.0 splits request paths in a way that can differ from how routing and WAF rules read them. An unauthenticated attacker can request a path such as /uploads/a.php.txt/b.php to run a PHP script that deny rules were meant to block.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["frankenphp","php","self-hosted","waf"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"unauthenticated requests run protected PHP scripts on the server","analyst_note":"Product ranges and affected-version detail were not supplied; confirm the fixed version against the vendor advisory.','product_name':'frankenphp','product_ecosystem':'runtime'}  ]}","how_to_check":"- Check the FrankenPHP version with `frankenphp version` or the version in your build or container image.\n- Look for upload or user-content directories that serve PHP files, and for route or WAF rules that block PHP paths.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["frankenphp-1.13.0-or-later","no-php-uploads"],"who_is_affected":"Servers running FrankenPHP older than 1.13.0 that serve PHP scripts, especially where users can upload files into web-accessible directories and route or WAF rules are used to block PHP execution. Deployments that do not run FrankenPHP, or that already run 1.13.0 or later, are not affected.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000772,"input_tokens":4652,"output_tokens":614,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-128025':14A,17A '-2026':13A,16A '/uploads/a.php.txt/b.php':54B,102C '1.13.0':27B,69C 'allow':82C 'attack':47B,84C,97C 'block':66B 'bug':5A 'cgi.go':80C 'compon':96C 'conflict':76C 'contain':70C 'cve':12A,15A 'deni':61B,112C 'despit':106C 'differ':36B 'embed':91C 'execut':86C,104C 'filenam':95C 'forg':115C 'frankenphp':1A,18B,25B,67C 'host':23B 'info':117C 'insid':93C 'interpret':75C 'let':6A 'level':109C 'like':101C 'meant':64B 'name':119C 'path':3A,30B,51B,73C,100C,116C 'path-split':2A,72C 'php':10A,19B,58B,88C,92C,121C 'protect':9A,87C 'read':43B 'request':7A,29B,49B,99C 'rout':39B,108C 'route-level':107C 'rule':42B,62B,113C 'run':8A,56B 'runtim':20B 'script':11A,59B,89C,118C 'self':22B,122C 'self-host':21B 'split':4A,28B,74C 'splitpo':78C 'unauthent':46B,83C 'uploads/a.php':105C 'valu':123C 'waf':24B,41B,111C 'way':33B","nicknames":[],"mitigations":[],"who_affected":"Servers running FrankenPHP older than 1.13.0 that serve PHP scripts, especially where users can upload files into web-accessible directories and route or WAF rules are used to block PHP execution. Deployments that do not run FrankenPHP, or that already run 1.13.0 or later, are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["frankenphp","medium","php","runtime","selfhosted","waf"],"campaign_type":null,"search_a":"'-128025':14A,17A '-2026':13A,16A 'bug':5A 'cve':12A,15A 'frankenphp':1A 'let':6A 'path':3A 'path-split':2A 'php':10A 'protect':9A 'request':7A 'run':8A 'script':11A 'split':4A","search_b":"'/uploads/a.php.txt/b.php':54B '1.13.0':27B 'attack':47B 'block':66B 'deni':61B 'differ':36B 'frankenphp':18B,25B 'host':23B 'meant':64B 'path':30B,51B 'php':19B,58B 'read':43B 'request':29B,49B 'rout':39B 'rule':42B,62B 'run':56B 'runtim':20B 'script':59B 'self':22B 'self-host':21B 'split':28B 'unauthent':46B 'waf':24B,41B 'way':33B","search_c":"'/uploads/a.php.txt/b.php':102C '1.13.0':69C 'allow':82C 'attack':84C,97C 'cgi.go':80C 'compon':96C 'conflict':76C 'contain':70C 'deni':112C 'despit':106C 'embed':91C 'execut':86C,104C 'filenam':95C 'forg':115C 'frankenphp':67C 'info':117C 'insid':93C 'interpret':75C 'level':109C 'like':101C 'name':119C 'path':73C,100C,116C 'path-split':72C 'php':88C,92C,121C 'protect':87C 'request':99C 'rout':108C 'route-level':107C 'rule':113C 'script':89C,118C 'self':122C 'split':74C 'splitpo':78C 'unauthent':83C 'uploads/a.php':105C 'valu':123C 'waf':111C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-10-04T14:04:44+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-128025","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128025","severity":null,"published_at":"2026-11-13T10:18:08+00:00","modified_at":"2026-11-13T10:18:08+00:00","first_seen_at":"2026-11-13T10:47:31+00:00","fetched_at":"2026-11-13T10:47:31+00:00","note":null}],"documents":[{"id":145350,"url":"https://github.com/php/frankenphp/security/advisories/GHSA-xxjp-cjxr-2x6m","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-10-04T14:04:44+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":145351,"url":"https://www.vulncheck.com/advisories/frankenphp-before-1.13.0-cgi-path-split-boundary-bypass-via-splitpos","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}