Authorization Bypass in Role Binding Creation

Capgo before 12.128.2 contains an authorization bypass vulnerability in POST /private/role_bindings that fails to verify app_id ownership during app-scoped role binding creation. An attacker with administrative privileges in one organization can create role bindings targeting applications owned by other organizations, enabling unauthorized read and modification of victim applications.

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-2026-56222 is an authorization bypass vulnerability in Capgo's role binding API endpoint that fails to validate application ownership during cross-organizational access requests. An authenticated administrator in one organization can exploit this flaw to create role bindings for applications they don't own, granting themselves read and write access to victim applications across organizational boundaries. This affects multi-tenant SaaS environments where application isolation is critical, putting any organization using Capgo versions before 12.128.2 at risk of data exfiltration, configuration tampering, and lateral movement across tenant boundaries.

Capsy.ai's security skills, powered by Claude's extended reasoning capabilities, detect the attack patterns behind this vulnerability across two MITRE ATT&CK tactical areas: Privilege Escalation (TA0004) and Credential Access (TA0006). Practitioners would identify suspicious patterns including: unauthorized API calls to /private/role_bindings with app_id parameters belonging to other organizations, successful role binding creation without corresponding ownership validation logs, and privilege escalation attempts where lower-privileged accounts suddenly gain cross-tenant application access. The 283 mapped Casky skills would flag anomalous authorization decisions, missing input validation checks on multi-tenant identifiers, and access patterns inconsistent with legitimate administrative workflows—enabling security teams to detect exploitation attempts before unauthorized modifications occur.

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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-2026-56222.

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-2026-56222

Casky has 283 skills that investigate the attack patterns behind CVE-2026-56222. Run one and get CVSS-scored findings in 3 minutes.

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