Cap-go Capgo Row-Level Security on_version_update file_name/file_hash/s3_path privileges management

Summaryinfo

A vulnerability has been found in Cap-go Capgo and classified as very critical. The impacted element is the function on_version_update of the component Row-Level Security. Performing a manipulation of the argument file_name/file_hash/s3_path results in privileges management. This vulnerability is reported as CVE-2026-100619. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Cap-go Capgo (the affected version unknown). This affects the function on_version_update of the component Row-Level Security. The manipulation of the argument file_name/file_hash/s3_path with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Capgo (capgo.app) blocks direct user inserts into the public.manifest table with a RESTRICTIVE row-level security policy, but that restriction can be bypassed indirectly. A principal holding an app-scoped upload/write/all API key (upload+ rights) or an authenticated user with write+ rights on an app can update public.app_versions.manifest on a version whose storage_provider is 'r2-direct', which is not covered by the bundle content-lock check. The on_version_update async worker trusts record.manifest and, using the service-role Supabase client, inserts the attacker-controlled file_name, file_hash, and s3_path into public.manifest before clearing app_versions.manifest. When a channel points to the crafted version, the /updates endpoint returns the service-role-created manifest entry as a client-facing download_url, enabling OTA manifest poisoning through a trusted async worker path. All versions are affected; no patch was available at the time of publication.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-100619 since 09/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/26/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• Cap-go

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• Capgo

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