EUVD-2026-38164
GHSA-fp2v-g9f3-6fwg
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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 endpoint exploitable by any low-privilege API-key holder with no user interaction; cross-tenant data exposure is a scope change with high confidentiality impact and no integrity or availability effect.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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
3DescriptionCVE.org
Capgo before 12.128.2 contains an authorization bypass vulnerability in the /build/status and /build/logs endpoints that allows attackers to access build jobs belonging to different applications by supplying a mismatched app_id and job_id combination. Limited API keys restricted to a single app can retrieve build status and logs from other apps by providing an authorized app_id while using a job_id from an unauthorized app, exposing sensitive build information including logs, metadata, and potentially credentials.
AnalysisAI
Cross-tenant authorization bypass in Capgo before 12.128.2 lets authenticated API clients read build status and logs belonging to other applications by combining an authorized app_id with a job_id from a different, unauthorized app. The /build/status and /build/logs endpoints validate the app_id but fail to verify that the supplied job_id actually belongs to that application, exposing logs, metadata, and potentially embedded credentials across tenant boundaries. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must hold a valid Capgo limited API key for any application on the target instance (PR:L) and must be able to reach the /build/status and /build/logs HTTP endpoints over the network. … 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:N/VA:N (7.1 High) accurately reflects a network-reachable, low-complexity, low-privilege information disclosure with high confidentiality impact and no integrity or availability effect, which matches the described behaviour. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker signs up for (or already holds) a low-tier Capgo account and obtains a limited API key scoped to their own application. They then call /build/status or /build/logs supplying their own app_id together with a job_id observed or guessed for a victim tenant, and the server returns the victim's build status and full log output, from which the attacker harvests environment variables, signing keys, and registry tokens for follow-on supply-chain abuse. |
| Remediation | Upgrade Capgo to 12.128.2 or later, which is the vendor-released patch referenced in the GHSA-2fw5-mcrx-wcqw advisory, and follow the guidance at https://github.com/Cap-go/capgo/security/advisories/GHSA-2fw5-mcrx-wcqw. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Authentication Bypass
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External POC / Exploit Code
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