EUVD-2026-42246
GHSA-4pg3-prvr-6562
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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-reachable API requiring a valid app-scoped key (PR:L); impact is limited to integrity of encryption metadata fields with no confidentiality or availability consequence.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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 policy bypass vulnerability in app_versions update enforcement that allows app-scoped API keys to downgrade encrypted bundles to non-encrypted state. Attackers with app-scoped all API keys can directly update the app_versions table via PostgREST to clear session_key and key_id fields, bypassing organization-enforced encrypted-bundle policies and weakening OTA security controls.
AnalysisAI
Policy bypass in Capgo's OTA update enforcement allows holders of app-scoped API keys to downgrade encrypted app bundles to an unencrypted state by directly manipulating the app_versions table through PostgREST. Affected versions are all Capgo releases prior to 12.128.2. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires possession of a valid Capgo app-scoped API key with 'all' permission level - this is a low-privilege credential but is still a credential that must be obtained or compromised. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.3 (Medium) reflects the bounded real-world impact accurately. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a valid app-scoped 'all' API key - through credential theft, insider access, or a compromised CI/CD pipeline secret - sends a crafted HTTP PATCH request to the PostgREST endpoint targeting the app_versions table, setting session_key and key_id to null for a target app version. The organization's encrypted-bundle policy is silently bypassed with no administrative alert, and subsequent OTA updates to that app version are delivered without bundle encryption, potentially exposing update content or enabling tampering. … |
| Remediation | Upgrade Capgo to version 12.128.2 or later, which resolves this policy enforcement gap. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today