{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-119127/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*"],"_cs_cves":[{"cvss":8.1,"id":"CVE-2026-119127"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["ZITADEL (\u003c 4.19.5)"],"_cs_severities":["high"],"_cs_tags":["web-application-vulnerability","host-header-injection","cve-2026-119127"],"_cs_type":"advisory","_cs_vendors":["ZITADEL"],"content_html":"\u003cp\u003eZITADEL versions 4.0.0 through 4.19.4 are vulnerable to host header injection within the Login V2 UI. An unauthenticated attacker can manipulate the host of generated URLs in password-reset, invite, and email-verification messages by injecting specific headers, including x-zitadel-public-host, x-zitadel-forward-host, and x-forwarded-host. By successfully influencing these links, an attacker can capture single-use authentication tokens when victims click them, facilitating account takeover for users and instance administrators.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation allows unauthenticated attackers to perform account takeovers, including high-privileged administrator accounts, by intercepting and harvesting sensitive authentication tokens sent via email.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade ZITADEL instances to version 4.19.5 or later immediately.\u003c/li\u003e\n\u003cli\u003eAudit logs for web requests containing unexpected or anomalous X-Forwarded-Host or X-Zitadel-prefixed headers targeting the Login V2 UI.\u003c/li\u003e\n\u003cli\u003eReview administrative access logs for suspicious modifications or account lifecycle events during the vulnerability window.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-10-29T17:33:26Z","date_published":"2026-10-29T17:33:26Z","id":"https://feed.craftedsignal.io/briefs/2026-10-zitadel-host-header-injection/","summary":"ZITADEL versions 4.0.0 before 4.19.5 are vulnerable to host header injection, allowing unauthenticated attackers to redirect sensitive authentication-related emails to attacker-controlled infrastructure.","title":"ZITADEL: Login V2 UI host header injection (CVE-2026-119127)","url":"https://feed.craftedsignal.io/briefs/2026-10-zitadel-host-header-injection/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-119127","version":"https://jsonfeed.org/version/1.1"}