{"id":"CVE-2026-103377","kind":"vulnerability","aliases":["CVE-2026-103377"],"related":[],"title":"Castile-La Mancha Parliament video library: reflected XSS runs script in visitors' browsers","description":"A reflected Cross-Site Scripting (XSS) vulnerability has been identified in the web application of the Castile-La Mancha Regional Parliament’s video library. The application embeds user-supplied content into the page without properly sanitising it before it is rendered by the browser. Exploitation of this vulnerability could allow a remote attacker to execute arbitrary JavaScript code in the browser of a victim who interacts with the content crafted for the attack.","summary":"A reflected cross-site scripting flaw exists in the web application of the Castile-La Mancha Regional Parliament's video library. User-supplied input is rendered into the page without sanitisation, so an attacker can run JavaScript in the browser of a victim who opens a crafted link or content.","severity":"medium","cvss":5.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","other","web-application"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-26T10:16:50+00:00","first_seen_at":"2026-10-26T10:29:17+00:00","triaged_at":"2026-10-26T10:30:58+00:00","updated_at":"2026-10-26T10:30:58+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-26T10:30:58Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Castile-La Mancha Parliament video library: reflected XSS runs script in visitors' browsers","impact":"medium","summary":"A reflected cross-site scripting flaw exists in the web application of the Castile-La Mancha Regional Parliament's video library. User-supplied input is rendered into the page without sanitisation, so an attacker can run JavaScript in the browser of a victim who opens a crafted link or content.","category":"other","nicknames":[],"who_cares":["web-application","browser"],"confidence":0.5,"needs_auth":"no","worst_case":"Attacker runs JavaScript in victim's browser on the video library site","analyst_note":"Identify the vendor or software behind the Castile-La Mancha parliament video library and whether any patch or affected version is published; check the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-103377.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000537,"input_tokens":3366,"output_tokens":400,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-103377':17A,20A '-2026':16A,19A 'allow':131C 'applic':25B,37B,93C,106C 'arbitrari':137C 'attack':62B,134C,154C 'browser':14A,21B,68B,125C,142C 'castil':2A,41B,97C 'castile-la':1A,40B,96C 'code':139C 'content':78B,111C,150C 'could':130C 'craft':75B,151C 'cross':29B,82C 'cross-sit':28B,81C 'cve':15A,18A 'emb':107C 'execut':136C 'exist':33B 'exploit':126C 'flaw':32B 'identifi':89C 'input':52B 'interact':147C 'javascript':65B,138C 'la':3A,42B,98C 'librari':7A,48B,104C 'link':76B 'mancha':4A,43B,99C 'open':73B 'page':57B,114C 'parliament':5A,45B,101C 'proper':116C 'reflect':8A,27B,80C 'region':44B,100C 'remot':133C 'render':54B,122C 'run':10A,64B 'sanitis':59B,117C 'script':11A,31B,84C 'site':30B,83C 'suppli':51B,110C 'user':50B,109C 'user-suppli':49B,108C 'victim':71B,145C 'video':6A,47B,103C 'visitor':13A 'vulner':86C,129C 'web':24B,36B,92C 'web-appl':23B 'without':58B,115C 'xss':9A,85C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T10:16:50+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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":"cve-coordination@incibe.es","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-103377","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103377","severity":null,"published_at":"2026-10-26T10:16:50+00:00","modified_at":"2026-10-26T10:16:50+00:00","first_seen_at":"2026-10-26T10:29:17+00:00","fetched_at":"2026-10-26T10:29:17+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"}