{"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/products/yudao-cloud--2026.01/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-7679"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["yudao-cloud \u003c= 2026.01"],"_cs_severities":["high"],"_cs_tags":["cve","authentication-bypass","web-application"],"_cs_type":"advisory","_cs_vendors":["YunaiV"],"content_html":"\u003cp\u003eA critical security vulnerability, identified as CVE-2026-7679, affects YunaiV yudao-cloud software up to version 2026.01. The vulnerability resides within the \u003ccode\u003egetAccessToken\u003c/code\u003e function of the \u003ccode\u003eyudao-module-system-biz/src/main/java/io/github/ruoyi/common/oauth2/service/impl/OAuth2TokenServiceImpl.java\u003c/code\u003e file. Successful exploitation allows remote attackers to perform unauthorized actions due to improper authentication mechanisms. The exploit is publicly available, raising the risk of widespread exploitation. The vendor was notified but did not respond, leaving users vulnerable. This vulnerability poses a significant risk to organizations using affected versions of yudao-cloud.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable instance of YunaiV yudao-cloud (\u0026lt;= 2026.01) exposed to the internet.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious request targeting the \u003ccode\u003egetAccessToken\u003c/code\u003e function within \u003ccode\u003eOAuth2TokenServiceImpl.java\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe crafted request exploits the improper authentication flaw in the \u003ccode\u003egetAccessToken\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe vulnerable function fails to properly validate the attacker's request.\u003c/li\u003e\n\u003cli\u003eThe attacker bypasses authentication and gains unauthorized access.\u003c/li\u003e\n\u003cli\u003eAttacker leverages the unauthorized access to perform privileged actions, potentially including data modification or exfiltration.\u003c/li\u003e\n\u003cli\u003eThe attacker could establish persistent access by creating rogue administrator accounts.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-7679 can lead to a complete compromise of the YunaiV yudao-cloud application. An attacker can gain unauthorized access to sensitive data, modify critical configurations, or disrupt services. Given that the exploit is publicly available, the risk of widespread exploitation is elevated. This could result in significant financial losses, reputational damage, and legal liabilities for affected organizations.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply available patches or upgrade to a secure version of YunaiV yudao-cloud that addresses CVE-2026-7679 immediately.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious requests targeting the \u003ccode\u003egetAccessToken\u003c/code\u003e function in \u003ccode\u003eOAuth2TokenServiceImpl.java\u003c/code\u003e using the provided Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement strict input validation and authentication mechanisms in the \u003ccode\u003egetAccessToken\u003c/code\u003e function to prevent similar vulnerabilities in the future.\u003c/li\u003e\n\u003cli\u003eReview and restrict network access to the yudao-cloud application, limiting access to authorized users and systems.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-03T05:15:59Z","date_published":"2026-05-03T05:15:59Z","id":"https://feed.craftedsignal.io/briefs/2026-05-03-yunai-auth-bypass/","summary":"YunaiV yudao-cloud up to version 2026.01 is vulnerable to improper authentication due to a flaw in the getAccessToken function, allowing remote attackers to bypass authentication.","title":"YunaiV yudao-cloud Improper Authentication Vulnerability (CVE-2026-7679)","url":"https://feed.craftedsignal.io/briefs/2026-05-03-yunai-auth-bypass/"}],"language":"en","title":"CraftedSignal Threat Feed - Yudao-Cloud \u003c= 2026.01","version":"https://jsonfeed.org/version/1.1"}