{"id":"CVE-2026-126954","kind":"vulnerability","aliases":["CVE-2026-126954"],"related":[],"title":"Glance: stored XSS lets malicious extension endpoints run script in dashboards","description":"Glance from 0.7.9 before 0.8.8 contains a stored cross-site scripting vulnerability that allows malicious extension endpoints to inject javascript: URLs via the Widget-Title-URL response header. Attackers controlling an extension endpoint can execute script when users click the widget title, reading dashboard pages through same-origin requests and exfiltrating content.","summary":"Glance, a self-hosted dashboard, trusts a Widget-Title-URL response header from extension endpoints, so a malicious endpoint can inject javascript: URLs. When a user clicks the widget title, the script runs in the dashboard and can read pages and send content elsewhere.","severity":"medium","cvss":4.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["dashboards","glance","other","self-hosted"],"not_affected_if":["default-config","no-extension-widgets","trusted-endpoints-only"],"how_to_check":"- Check the installed Glance version with `glance --version` or the image tag in your deployment; affected versions are `0.7.9` up to but not including `0.8.8`.\n- Review which extension widgets are configured in your Glance config file and whether any point to untrusted endpoints.","fix":"- Glance: upgrade to `0.8.8` or later.","status":"open","published_at":"2026-11-13T10:18:02+00:00","first_seen_at":"2026-11-13T10:47:28+00:00","triaged_at":"2026-11-13T10:58:47+00:00","updated_at":"2026-11-13T10:58:47+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-13T10:58:47Z","model":"claude-haiku-5-5","output":{"fix":"- Glance: upgrade to `0.8.8` or later.","reach":"network","title":"Glance: stored XSS lets malicious extension endpoints run script in dashboards","impact":"medium","summary":"Glance, a self-hosted dashboard, trusts a Widget-Title-URL response header from extension endpoints, so a malicious endpoint can inject javascript: URLs. When a user clicks the widget title, the script runs in the dashboard and can read pages and send content elsewhere.","audience":"businesses","category":"other","nicknames":[],"who_cares":["glance","self-hosted","dashboards"],"confidence":0.7,"fix_status":"available","needs_auth":"unknown","worst_case":"script runs in the dashboard and reads and exfiltrates page content","analyst_note":"","how_to_check":"- Check the installed Glance version with `glance --version` or the image tag in your deployment; affected versions are `0.7.9` up to but not including `0.8.8`.\n- Review which extension widgets are configured in your Glance config file and whether any point to untrusted endpoints.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["default-config","no-extension-widgets","trusted-endpoints-only"],"who_is_affected":"Teams running Glance 0.7.9 through 0.8.x before 0.8.8 that use extension widgets. Exposure requires an extension endpoint that an attacker controls or can influence; installations using only built-in widgets or trusted endpoints are less exposed.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000745,"input_tokens":4667,"output_tokens":557,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-126954':14A,17A '-2026':13A,16A '0.7.9':72C '0.8.8':74C 'allow':84C 'attack':100C 'click':52B,110C 'contain':75C 'content':68B,124C 'control':101C 'cross':79C 'cross-sit':78C 'cve':12A,15A 'dashboard':11A,18B,29B,61B,115C 'elsewher':69B 'endpoint':7A,40B,44B,87C,104C 'execut':106C 'exfiltr':123C 'extens':6A,39B,86C,103C 'glanc':1A,19B,24B,70C 'header':37B,99C 'host':23B,28B 'inject':46B,89C 'javascript':47B,90C 'let':4A 'malici':5A,43B,85C 'origin':120C 'page':65B,116C 'read':64B,114C 'request':121C 'respons':36B,98C 'run':8A,58B 'same-origin':118C 'script':9A,57B,81C,107C 'self':22B,27B 'self-host':21B,26B 'send':67B 'site':80C 'store':2A,77C 'titl':34B,55B,96C,113C 'trust':30B 'url':35B,48B,91C,97C 'user':51B,109C 'via':92C 'vulner':82C 'widget':33B,54B,95C,112C 'widget-title-url':32B,94C 'xss':3A","nicknames":[],"mitigations":[],"who_affected":"Teams running Glance 0.7.9 through 0.8.x before 0.8.8 that use extension widgets. Exposure requires an extension endpoint that an attacker controls or can influence; installations using only built-in widgets or trusted endpoints are less exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["dashboards","glance","medium","other","selfhosted"],"campaign_type":null,"search_a":"'-126954':14A,17A '-2026':13A,16A 'cve':12A,15A 'dashboard':11A 'endpoint':7A 'extens':6A 'glanc':1A 'let':4A 'malici':5A 'run':8A 'script':9A 'store':2A 'xss':3A","search_b":"'click':52B 'content':68B 'dashboard':18B,29B,61B 'elsewher':69B 'endpoint':40B,44B 'extens':39B 'glanc':19B,24B 'header':37B 'host':23B,28B 'inject':46B 'javascript':47B 'malici':43B 'page':65B 'read':64B 'respons':36B 'run':58B 'script':57B 'self':22B,27B 'self-host':21B,26B 'send':67B 'titl':34B,55B 'trust':30B 'url':35B,48B 'user':51B 'widget':33B,54B 'widget-title-url':32B","search_c":"'0.7.9':72C '0.8.8':74C 'allow':84C 'attack':100C 'click':110C 'contain':75C 'content':124C 'control':101C 'cross':79C 'cross-sit':78C 'dashboard':115C 'endpoint':87C,104C 'execut':106C 'exfiltr':123C 'extens':86C,103C 'glanc':70C 'header':99C 'inject':89C 'javascript':90C 'malici':85C 'origin':120C 'page':116C 'read':114C 'request':121C 'respons':98C 'same-origin':118C 'script':81C,107C 'site':80C 'store':77C 'titl':96C,113C 'url':91C,97C 'user':109C 'via':92C 'vulner':82C 'widget':95C,112C 'widget-title-url':94C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-07T16:25:56+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126954","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126954","severity":null,"published_at":"2026-11-13T10:18:02+00:00","modified_at":"2026-11-13T10:18:02+00:00","first_seen_at":"2026-11-13T10:47:28+00:00","fetched_at":"2026-11-13T10:47:28+00:00","note":null}],"documents":[{"id":145268,"url":"https://github.com/glanceapp/glance/commit/e19081cfa029edbe16b1354ffe03076a8cdf0244","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":145269,"url":"https://github.com/glanceapp/glance/releases/tag/v0.8.8","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":145270,"url":"https://github.com/glanceapp/glance/security/advisories/GHSA-96x7-3hwp-rcfc","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-11-07T16:25:56+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":145271,"url":"https://github.com/glanceapp/glance/security/advisories/GHSA-f2c4-p935-ffpj","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-11-07T16:28:03+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":145272,"url":"https://www.vulncheck.com/advisories/glance-0.7.9-before-0.8.8-stored-xss-via-widget-title-url-header","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"}