{"id":"CVE-2026-125871","kind":"vulnerability","aliases":["CVE-2026-125871"],"related":[],"title":"MISP Modules: sourcecache expansion lets users fetch internal URLs and files","description":"The sourcecache expansion module in MISP Modules (misp-modules) contains a Server-Side Request Forgery (SSRF) vulnerability. When a user with permission to create or modify attributes of type 'link' or 'url' submits an attribute value, the module passes the URL directly to its internal archiving function without any validation of the target address. An attacker can therefore craft a URL pointing to loopback addresses (e.g., 127.0.0.1), private network ranges, link-local addresses, or cloud metadata endpoints (e.g., 169.254.169.254). The MISP server will issue an HTTP request to that target and store the response body in the event, effectively exfiltrating data from internal services to the attacker through the MISP interface. Non-HTTP schemes such as file:// are also accepted, potentially allowing local file disclosure. The vulnerability requires an authenticated MISP user with the ability to create or edit attributes of the affected types. The security impact is information disclosure from internal services reachable by the MISP server, including sensitive data such as cloud credentials, internal application data, or local files.","summary":"The sourcecache expansion module in MISP Modules passes user-submitted link and URL attribute values straight to its archiving function with no address validation. An authenticated user can make the MISP server fetch loopback, private, link-local or cloud metadata addresses, or file:// paths, and read the response back in the event.","severity":"medium","cvss":6.3,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"misp-modules","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["misp","misp-modules","other","self-hosted","threat-intel"],"not_affected_if":["module-not-enabled","trusted-users-only"],"how_to_check":"- Check the installed misp-modules version against the fixed version in the Patch link from the sources.\n- Check whether the sourcecache expansion module is enabled in your misp-modules configuration.","fix":"- Move misp-modules to the fixed version stated in the patch (version number unknown from the sources).","status":"open","published_at":"2026-11-10T13:18:23+00:00","first_seen_at":"2026-11-10T13:22:03+00:00","triaged_at":"2026-11-10T13:23:29+00:00","updated_at":"2026-11-10T13:23:29+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-10T13:23:29Z","model":"claude-haiku-5-5","output":{"fix":"- Move misp-modules to the fixed version stated in the patch (version number unknown from the sources).","reach":"network","title":"MISP Modules: sourcecache expansion lets users fetch internal URLs and files","impact":"medium","summary":"The sourcecache expansion module in MISP Modules passes user-submitted link and URL attribute values straight to its archiving function with no address validation. An authenticated user can make the MISP server fetch loopback, private, link-local or cloud metadata addresses, or file:// paths, and read the response back in the event.","audience":"businesses","category":"other","nicknames":[],"who_cares":["misp","misp-modules","threat-intel","self-hosted"],"confidence":0.7,"fix_status":"available","needs_auth":"yes","worst_case":"Internal service data and local files readable through MISP event contents","analyst_note":"","how_to_check":"- Check the installed misp-modules version against the fixed version in the Patch link from the sources.\n- Check whether the sourcecache expansion module is enabled in your misp-modules configuration.\n- unknown for any further checks the sources do not describe.","plain_action":"","product_name":"misp-modules","needs_analyst":false,"not_affected_if":["module-not-enabled","trusted-users-only"],"who_is_affected":"MISP servers running misp-modules with the sourcecache expansion module, where users can create or edit link or url attributes. Exposure is limited to what the MISP server can reach internally, including cloud metadata endpoints and local files. Instances without the module or without untrusted authenticated users are less exposed.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000777,"input_tokens":4825,"output_tokens":590,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-125871':14A,17A '-2026':13A,16A '127.0.0.1':153C '169.254.169.254':166C 'abil':222C 'accept':207C 'address':55B,74B,140C,151C,160C 'affect':230C 'allow':209C 'also':206C 'applic':254C 'archiv':51B,132C 'attack':142C,194C 'attribut':46B,113C,121C,227C 'authent':58B,217C 'back':81B 'bodi':182C 'cloud':72B,162C,251C 'contain':95C 'craft':145C 'creat':110C,224C 'credenti':252C 'cve':12A,15A 'data':188C,248C,255C 'direct':128C 'disclosur':212C,237C 'e.g':152C,165C 'edit':226C 'effect':186C 'endpoint':164C 'event':84B,185C 'exfiltr':187C 'expans':4A,34B,87C 'fetch':7A,65B 'file':11A,211C,258C 'forgeri':101C 'function':52B,133C 'host':28B 'http':173C,201C 'impact':234C 'includ':246C 'inform':236C 'intel':31B 'interfac':198C 'intern':8A,131C,190C,239C,253C 'issu':171C 'let':5A 'link':43B,69B,116C,158C 'link-loc':68B,157C 'local':70B,159C,210C,257C 'loopback':66B,150C 'make':61B 'metadata':73B,163C 'misp':1A,19A,21B,23B,37B,63B,90C,93C,168C,197C,218C,244C 'misp-modul':22B,92C 'misp-modules':18A 'modifi':112C 'modul':2A,24B,35B,38B,88C,91C,94C,124C 'modules':20A 'network':155C 'non':200C 'non-http':199C 'pass':39B,125C 'path':76B 'permiss':108C 'point':148C 'potenti':208C 'privat':67B,154C 'rang':156C 'reachabl':241C 'read':78B 'request':100C,174C 'requir':215C 'respons':80B,181C 'scheme':202C 'secur':233C 'self':27B 'self-host':26B 'sensit':247C 'server':64B,98C,169C,245C 'server-sid':97C 'servic':191C,240C 'side':99C 'sourcecach':3A,33B,86C 'ssrf':102C 'store':179C 'straight':48B 'submit':42B,119C 'target':139C,177C 'therefor':144C 'threat':30B 'threat-intel':29B 'type':115C,231C 'url':9A,45B,118C,127C,147C 'user':6A,41B,59B,106C,219C 'user-submit':40B 'valid':56B,136C 'valu':47B,122C 'vulner':103C,214C 'without':134C","nicknames":[],"mitigations":[],"who_affected":"MISP servers running misp-modules with the sourcecache expansion module, where users can create or edit link or url attributes. Exposure is limited to what the MISP server can reach internally, including cloud metadata endpoints and local files. Instances without the module or without untrusted authenticated users are less exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["mispmodules"],"ptokens":["misp","modules"],"labels":["medium","misp","mispmodules","other","selfhosted","threatintel","vendor"],"campaign_type":null,"search_a":"'-125871':14A,17A '-2026':13A,16A 'cve':12A,15A 'expans':4A 'fetch':7A 'file':11A 'intern':8A 'let':5A 'misp':1A,19A 'misp-modules':18A 'modul':2A 'modules':20A 'sourcecach':3A 'url':9A 'user':6A","search_b":"'address':55B,74B 'archiv':51B 'attribut':46B 'authent':58B 'back':81B 'cloud':72B 'event':84B 'expans':34B 'fetch':65B 'function':52B 'host':28B 'intel':31B 'link':43B,69B 'link-loc':68B 'local':70B 'loopback':66B 'make':61B 'metadata':73B 'misp':21B,23B,37B,63B 'misp-modul':22B 'modul':24B,35B,38B 'pass':39B 'path':76B 'privat':67B 'read':78B 'respons':80B 'self':27B 'self-host':26B 'server':64B 'sourcecach':33B 'straight':48B 'submit':42B 'threat':30B 'threat-intel':29B 'url':45B 'user':41B,59B 'user-submit':40B 'valid':56B 'valu':47B","search_c":"'127.0.0.1':153C '169.254.169.254':166C 'abil':222C 'accept':207C 'address':140C,151C,160C 'affect':230C 'allow':209C 'also':206C 'applic':254C 'archiv':132C 'attack':142C,194C 'attribut':113C,121C,227C 'authent':217C 'bodi':182C 'cloud':162C,251C 'contain':95C 'craft':145C 'creat':110C,224C 'credenti':252C 'data':188C,248C,255C 'direct':128C 'disclosur':212C,237C 'e.g':152C,165C 'edit':226C 'effect':186C 'endpoint':164C 'event':185C 'exfiltr':187C 'expans':87C 'file':211C,258C 'forgeri':101C 'function':133C 'http':173C,201C 'impact':234C 'includ':246C 'inform':236C 'interfac':198C 'intern':131C,190C,239C,253C 'issu':171C 'link':116C,158C 'link-loc':157C 'local':159C,210C,257C 'loopback':150C 'metadata':163C 'misp':90C,93C,168C,197C,218C,244C 'misp-modul':92C 'modifi':112C 'modul':88C,91C,94C,124C 'network':155C 'non':200C 'non-http':199C 'pass':125C 'permiss':108C 'point':148C 'potenti':208C 'privat':154C 'rang':156C 'reachabl':241C 'request':100C,174C 'requir':215C 'respons':181C 'scheme':202C 'secur':233C 'sensit':247C 'server':98C,169C,245C 'server-sid':97C 'servic':191C,240C 'side':99C 'sourcecach':86C 'ssrf':102C 'store':179C 'submit':119C 'target':139C,177C 'therefor':144C 'type':115C,231C 'url':118C,127C,147C 'user':106C,219C 'valid':136C 'valu':122C 'vulner':103C,214C 'without':134C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T13:18:23+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/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":"5a6e4751-2f3f-4070-9419-94fb35b644e8","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-125871","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125871","severity":null,"published_at":"2026-11-10T13:18:23+00:00","modified_at":"2026-11-10T13:18:23+00:00","first_seen_at":"2026-11-10T13:22:03+00:00","fetched_at":"2026-11-10T13:22:03+00:00","note":null}],"documents":[{"id":115154,"url":"https://github.com/MISP/misp-modules/commit/7cb31e96a1f59bec9afbc087b27b26d9986c6841","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.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"}