{"id":"CVE-2026-112309","kind":"vulnerability","aliases":["CVE-2026-112309"],"related":[],"title":"@rvf/set-get: prototype pollution via form field lets attackers crash servers","description":"@rvf/set-get before 7.0.4 contains a prototype pollution vulnerability in setPath that allows unauthenticated attackers to overwrite properties of shared built-in functions via inherited Object.prototype methods. Attackers can submit a form field named hasOwnProperty.call through @rvf/core form parsing to replace the shared function property, causing process-wide denial of service until restart.","summary":"The @rvf/set-get npm package's setPath function lets an unauthenticated attacker overwrite built-in Object.prototype methods by submitting a form field named hasOwnProperty.call through @rvf/core. The overwrite persists process-wide and causes denial of service until the process restarts.","severity":"high","cvss":8.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["@rvf/core","form-parsing","node","npm","package"],"not_affected_if":["@rvf/set-get-not-installed","version-7.0.4-or-later"],"how_to_check":"Run npm ls @rvf/set-get and npm ls @rvf/core to see whether either is installed and at what version.\nAny installed @rvf/set-get below 7.0.4 is affected.","fix":"Upgrade @rvf/set-get to 7.0.4 or later and rebuild and redeploy.\nRestart processes after upgrading, since a polluted process stays polluted until restart.","status":"open","published_at":"2026-10-19T16:17:07+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","triaged_at":"2026-10-23T22:37:31+00:00","updated_at":"2026-10-23T22:37:31+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T22:37:31Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade @rvf/set-get to 7.0.4 or later and rebuild and redeploy.\nRestart processes after upgrading, since a polluted process stays polluted until restart.","reach":"internet","title":"@rvf/set-get: prototype pollution via form field lets attackers crash servers","impact":"medium","summary":"The @rvf/set-get npm package's setPath function lets an unauthenticated attacker overwrite built-in Object.prototype methods by submitting a form field named hasOwnProperty.call through @rvf/core. The overwrite persists process-wide and causes denial of service until the process restarts.","category":"package","who_cares":["npm","node","@rvf/core","form-parsing"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker crashes the whole process via shared function overwrite until restart.","analyst_note":"Confirm which @rvf/core paths call setPath with form field names and whether the crash is reachable on default configs; source is NVD only, no advisory or patch notes checked.","how_to_check":"Run npm ls @rvf/set-get and npm ls @rvf/core to see whether either is installed and at what version.\nAny installed @rvf/set-get below 7.0.4 is affected.\nunknown whether other install paths or bundled copies exist.","needs_analyst":true,"not_affected_if":["@rvf/set-get-not-installed","version-7.0.4-or-later"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00056,"input_tokens":2946,"output_tokens":530,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-112309':13A,16A '-2026':12A,15A '7.0.4':67C 'allow':76C 'attack':8A,34B,78C,92C 'built':37B,85C 'built-in':36B,84C 'caus':57B,110C 'contain':68C 'crash':9A 'cve':11A,14A 'denial':58B,114C 'field':6A,45B,97C 'form':5A,19B,44B,96C,102C 'form-pars':18B 'function':30B,87C,108C 'hasownproperty.call':47B,99C 'inherit':89C 'let':7A,31B 'method':40B,91C 'name':46B,98C 'node':21B 'npm':22B,26B 'object.prototype':39B,90C 'overwrit':35B,51B,80C 'packag':23B,27B 'pars':20B,103C 'persist':52B 'pollut':3A,71C 'process':54B,63B,112C 'process-wid':53B,111C 'properti':81C,109C 'prototyp':2A,70C 'replac':105C 'restart':64B,118C 'rvf/core':17B,49B,101C 'rvf/set-get':1A,25B,65C 'server':10A 'servic':60B,116C 'setpath':29B,74C 'share':83C,107C 'submit':42B,94C 'unauthent':33B,77C 'via':4A,88C 'vulner':72C 'wide':55B,113C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T16:17:07+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-2026-112309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112309","severity":null,"published_at":"2026-10-19T16:17:07+00:00","modified_at":"2026-10-22T04:17:32+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","fetched_at":"2026-10-23T22:28:57+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}