Tuleap Authorization Bypass Exposes Cross-User Data Access

An Authorization Bypass Through User-Controlled Key vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker to access data of other users without authorization.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-14165 is an authorization bypass vulnerability in Tuleap Enterprise Edition versions 17.0 through 17.5 that stems from improper handling of user-controlled keys in access control logic (CWE-639). This flaw allows attackers to circumvent authentication mechanisms and access sensitive data belonging to other users without proper authorization. Organizations running affected Tuleap versions face immediate risk of unauthorized data disclosure, particularly concerning for enterprises using Tuleap for project management, collaboration, and sensitive document storage. The vulnerability impacts confidentiality and potentially integrity of multi-tenant environments where data isolation is critical.

Casky's 283 mapped skills leverage Claude's extended reasoning to detect the attack patterns associated with this vulnerability across MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Practitioners using Casky would observe findings highlighting suspicious patterns such as: anomalous API requests with manipulated user identifiers or session tokens, cross-user data retrieval attempts that bypass standard authorization checks, and access logs showing authenticated sessions accessing resources outside their assigned permissions. The platform's skill mapping enables detection of the authorization logic flaws by correlating user-controlled input validation failures with unauthorized resource access, helping security teams identify exploitation attempts before data exfiltration occurs and pinpoint which Tuleap instances require immediate patching to versions 17.6 or later.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-14165.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-14165

Casky has 283 skills that investigate the attack patterns behind CVE-2026-14165. Run one and get CVSS-scored findings in 3 minutes.

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