Medium severity · published Sep 26, 2026
CVE-2026-100621
capgo.app Content-Lock Bypass via r2-direct Bundle Mutation
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
Capgo (capgo.app) contains an incomplete access-control/content-lock enforcement issue affecting all versions; no patch is available at the time of publication. The `enforce_encrypted_bundle_trigger` / `check_encrypted_bundle_on_insert` content lock in supabase/schemas/prod.sql exempts `app_versions` rows whose previous `storage_provider` is `r2-direct`, so delivery-critical columns (name, app_id, session_key, key_id, storage_provider, r2_path, external_url, checksum, manifest, native_packages) remain mutable while a row is in that state. Separately, the channel/version join used by the `/updates` endpoint (supabase/functions/_backend/utils/pg.ts) filters only deleted versions and does not exclude `r2-direct` versions, so such rows remain OTA-selectable. An attacker holding a Capgo API key with bundle write/upload permission can create or keep a bundle version in the `r2-direct` state, assign it to a channel, and then modify these fields via direct PostgREST requests, causing altered bundle metadata (for example checksum and session_key) to be served to devices through `/updates`. This bypasses the post-upload content immutability hardening added for a previous app_versions metadata-tampering issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
capgo.app · Cap-go
0 · source: vendor
Affected product
CA
capgo.app
Cap-go
More from capgo.app
9.1
CVE-2026-88864
Capgo SSO Provider Authentication Bypass via PostgREST Direct Write
8.8
CVE-2026-100623
Capgo Authentication Bypass via Direct PostgREST org_users Table Write
8.8
CVE-2026-100619
Capgo OTA Manifest Poisoning via app_versions.manifest Bypass
8.8
CVE-2026-100617
Cap-go capgo.app Authorization Bypass via channel_permission_overrides
8.8
CVE-2026-100615
Cap-go capgo.app before 12.267.1 Privilege Escalation via API Key Rotation