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PatchSiren cyber security CVE debrief

CVE-2026-56229 Capgo CVE debrief

CVE-2026-56229 is a high-severity authorization bypass vulnerability in Capgo, a mobile app development platform. The vulnerability exists in the /build/status and /build/logs endpoints, allowing attackers to access build jobs belonging to different applications by supplying a mismatched app_id and job_id combination. This issue affects Capgo versions before 12.128.2. Defenders should prioritize patching to limit exposure. The vulnerability has a CVSS score of 7.1 and is considered high severity.

Vendor
Capgo
Product
Unknown
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-21
Original CVE updated
2026-06-22
Advisory published
2026-06-21
Advisory updated
2026-06-22

Who should care

Organizations using Capgo for mobile app development should be aware of this vulnerability and take immediate action to protect their applications. Specifically, teams responsible for mobile app development, security, and infrastructure should prioritize patching Capgo to version 12.128.2 or later. Additionally, security teams should review their current configurations and monitor for potential exploitation attempts.

Technical summary

The vulnerability in Capgo allows attackers with limited API keys restricted to a single app to retrieve build status and logs from other apps. This is achieved by providing an authorized app_id while using a job_id from an unauthorized app. The exposure includes sensitive build information such as logs, metadata, and potentially credentials. The issue arises from inadequate authorization checks in the /build/status and /build/logs endpoints.

Defensive priority

High priority due to potential for sensitive information disclosure and exploitation by attackers with limited API keys.

Recommended defensive actions

  • Apply the patch by updating Capgo to version 12.128.2 or later.
  • Review and restrict API key permissions to ensure they are not overly permissive.
  • Monitor /build/status and /build/logs endpoints for suspicious activity.
  • Implement additional logging and monitoring to detect potential exploitation attempts.
  • Conduct a thorough review of Capgo configurations and security settings.

Evidence notes

The primary evidence for this vulnerability comes from the CVE record and references provided by Vulncheck. The vulnerability affects Capgo versions before 12.128.2. Defenders should verify the current version of Capgo in use and confirm that it is not exposed to the internet or untrusted networks. Additionally, reviewing API key usage and restricting permissions can help mitigate the risk.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56229 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56229

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-56229 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56229

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.