EUVD-2026-38116
GHSA-j8w3-fhfr-rrvp
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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
Requires authenticated organization administrator access to modify password policy (PR:H, AV:N, AC:L); impact is purely high-severity availability loss with no confidentiality or integrity effects, no scope change.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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
Lifecycle Timeline
2DescriptionCVE.org
Capgo before 12.128.2 fails to enforce a maximum value on the minimum password length field in its password policy configuration. An authenticated organization administrator can set an extremely large numeric value (e.g., billions of characters) as the minimum password length, making compliance impossible for all organization members. Once the policy is enabled, users (including administrators) are unable to change their passwords or access the organization, resulting in an organization-wide account lockout and application-level denial of service.
AnalysisAI
Capgo's password policy configuration in versions before 12.128.2 can be exploited by an authenticated organization administrator to trigger an organization-wide account lockout by setting an arbitrarily large minimum password length - such as billions of characters - with no server-side upper-bound enforcement. Once the malicious policy is enabled, every organization member including other administrators is prevented from setting a compliant password, permanently blocking access to the organization and constituting an application-level denial of service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation strictly requires an active authenticated session holding the organization administrator role within the target Capgo organization - this is the definitive prerequisite confirmed by the CVSS 4.0 PR:H metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 (Medium) accurately reflects the elevated privilege requirement (PR:H - organization administrator role) as the principal attack constraint, which substantially narrows the exploitable population compared to an unauthenticated flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained organization administrator credentials - through phishing, credential stuffing, or insider access - logs into the Capgo web interface, navigates to the organization's password policy settings, enters an integer value such as 2,000,000,000 as the minimum password length, and enables the policy. From that moment, all organization members encounter an unresolvable password compliance failure on any password change attempt, locking out the entire organization with no self-service recovery path. … |
| Remediation | The primary remediation is to upgrade Capgo to version 12.128.2 or later, which introduces server-side enforcement of a maximum allowable value for the minimum password length field, closing the improper input validation gap. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Denial Of Service
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External POC / Exploit Code
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