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CVE-2026-100621— capgo.app Content-Lock Bypass via r2-direct Bundle Mutation

Quick assessment

Affected
Cap-go capgo.app
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Capgo（capgo.app）存在一个不完整的访问控制/内容锁定强制执行漏洞，影响所有版本；在发布时暂无补丁可用。 中的 / 内容锁定机制豁免了那些前一个 为 的 行，导致在这些行处于该状态时，关键交付列（包括 name、app_id、session_key、key_id、storage_provider、r2_path、external_url、checksum、manifest、native_packages）仍可被修改。此外，由 端点使用的通道/版本关联逻辑（位于 ）仅过滤已删除的版本，并未排除 类型的版本

CVSS 4.3 · Medium EPSS 0.22% · P12
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I. Basic Information for CVE-2026-100621

Vulnerability Information
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Vulnerability Title
capgo.app Content-Lock Bypass via r2-direct Bundle Mutation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cap-go capgo.app - -

II. Public POCs for CVE-2026-100621

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III. Intelligence Information for CVE-2026-100621

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Other References for CVE-2026-100621 (1)

Other References for CVE-2026-100621 (1)

Same Patch Batch · Cap-go · 2026-09-26 · 19 CVEs total

CVE-2026-100619 8.8 HIGH Capgo OTA Manifest Poisoning via app_versions.manifest Bypass
CVE-2026-100614 8.8 HIGH Capgo before 12.244.1 Cross-Tenant Image Overwrite via Metadata Worker
CVE-2026-100623 8.8 HIGH Capgo Authentication Bypass via Direct PostgREST org_users Table Write
CVE-2026-100617 8.8 HIGH Cap-go capgo.app Authorization Bypass via channel_permission_overrides
CVE-2026-100615 8.8 HIGH Cap-go capgo.app before 12.267.1 Privilege Escalation via API Key Rotation
CVE-2026-100618 8.5 HIGH Capgo App Icon Update Privilege Escalation via Service-Role Worker
CVE-2026-100627 8.1 HIGH Capgo bundle promotion API channel RBAC deny override bypass
CVE-2026-100622 7.5 HIGH capgo.app through 12.129.0 Cache Restoration of Deleted Bundles
CVE-2026-100612 7.2 HIGH Capgo SSO Provider ID Authentication Bypass via Incomplete Migration
CVE-2026-100625 7.1 HIGH Capgo Build Upload Proxy Authorization Bypass via TUS Resource
CVE-2026-100611 6.5 MEDIUM Capgo apikey_manager Role Privilege Escalation via Incomplete Role Deny-list
CVE-2026-100629 5.5 MEDIUM Capgo backend before 12.127.5 Privilege Escalation via role_bindings PATCH
CVE-2026-100616 5.5 MEDIUM capgo.app Authentication Bypass via PostgREST customer_id Mutation
CVE-2026-100624 5.4 MEDIUM Capgo.app before 12.264.5 Upload Expiry Bypass via build upload
CVE-2026-100613 5.3 MEDIUM capgo.app Authorization Bypass via Stale Channel Permission Overrides
CVE-2026-100626 4.3 MEDIUM capgo through 12.128.2 IDOR via PUT /app icon endpoint
CVE-2026-100628 4.3 MEDIUM capgo.app before 12.128.12 Authentication Bypass via apikey
CVE-2026-100620 3.8 LOW Capgo CLI through 7.98.2 Excessive Permissions via Overpermissioned Play Console Service A

IV. Related Vulnerabilities

Same product: capgo.app
Same vendor: Cap-go
Same weakness: CWE-284

V. Comments for CVE-2026-100621

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