EUVD-2026-38102
GHSA-cr4w-2ppq-m3wq
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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
Network endpoint, no special conditions, requires a low-privilege app-limited key (PR:L), no user interaction; scope changes from scoped key to org-wide resources (S:C) with full CIA impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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 contains a scope escalation vulnerability in the POST /functions/v1/apikey endpoint that allows app-limited API keys to mint unrestricted keys by setting empty limits. Attackers with a compromised app-limited key can create an unrestricted key with org-wide access to resources like app listings and other protected endpoints.
AnalysisAI
Privilege escalation in Capgo before 12.128.2 allows holders of app-limited API keys to mint new unrestricted keys via the POST /functions/v1/apikey endpoint by submitting empty limit fields. The flaw effectively bypasses the API key scoping model, granting org-wide access to app listings and other protected resources from any compromised low-privilege key. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires (1) a running Capgo deployment at a version below 12.128.2, and (2) possession of any valid app-limited API key for the target organization to authenticate the POST /functions/v1/apikey request. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) scores 8.7, reflecting a network-reachable, low-complexity flaw that needs only a low-privilege (app-limited) API key to produce full-confidentiality, integrity, and availability impact within an organization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who obtains an app-limited Capgo API key - for example by extracting it from a decompiled mobile binary, CI log, or a leaked .env file - issues a POST to /functions/v1/apikey with an empty limits payload. The server returns a new, unrestricted org-wide key, which the attacker then uses to enumerate all app listings, pull update bundles, and tamper with OTA deployments across the victim organization. |
| Remediation | Vendor-released patch: upgrade Capgo to 12.128.2 or later, per the GitHub Security Advisory GHSA-2ff8-7h96-hwfp (https://github.com/Cap-go/capgo/security/advisories/GHSA-2ff8-7h96-hwfp). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit all API keys in use, identify which are app-limited, and review recent access logs for suspicious /functions/v1/apikey POST requests. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
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