EUVD-2026-38744Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/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 PostgREST API, low complexity, authenticated low-privileged user (PR:L), no UI; integrity High due to ownership tampering, confidentiality Low, availability unaffected.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/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 allows direct patching of public.apps.owner_org through PostgREST, bypassing the transfer_app() workflow and creating split-brain ownership. Attackers can directly update apps.owner_org while leaving app_versions.owner_org unchanged, enabling old-org keys to retain access to version data while new-org keys control the app record.
AnalysisAI
Authorization bypass in Capgo before 12.128.2 allows authenticated users to directly modify the public.apps.owner_org column via PostgREST, circumventing the intended transfer_app() workflow. Successful exploitation creates a split-brain ownership state where apps.owner_org and app_versions.owner_org diverge, letting the original organization's API keys retain access to version data while the new owning organization controls the app record. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated session with a low-privileged Capgo role that is permitted to call PostgREST against the public.apps table (PR:L in the CVSS vector), network reachability to the Capgo PostgREST API, and a Capgo instance running a version older than 12.128.2 where column-level permissions on apps.owner_org are not enforced. … 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:L/VI:H) scores 7.1 and is internally consistent with the description: network-reachable PostgREST endpoint, low complexity, and an authenticated low-privileged user is sufficient - the integrity impact is High because attackers can corrupt ownership records, while confidentiality is only Low (leakage limited to version data) and availability is unaffected. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a valid low-privileged Capgo account (for example, a member of a tenant organization) sends an authenticated PATCH /apps?id=eq.<target> request to the Capgo PostgREST endpoint setting owner_org to an attacker-controlled organization. Because the transfer_app() workflow is skipped, app_versions.owner_org is left untouched, so the original org's API keys keep reading and shipping version artifacts while the attacker's org now owns the app record and can manipulate downstream metadata. … |
| Remediation | Vendor-released patch: upgrade Capgo to 12.128.2 or later, which tightens PostgREST/PostgreSQL permissions so that public.apps.owner_org can no longer be PATCHed directly and ownership transfers must flow through the transfer_app() function; see GHSA-v9jp-r5wh-qqcp for details. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Capgo instances in use and confirm their versions. …
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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