Kurz gesagt
- CVE-2026-46552 ist eine Schwachstelle (MITTEL (CVSS 5.8)) in nocodb.
- Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 0.31%, höher als bei 24.2% aller Schwachstellen.
- Noch keine gepatchte Version bekannt: Herstellerhinweise unter Referenzen verfolgen.
| Package | Affected versions | Patched versions |
|---|
| nocodb npm | ≤ 0.301.3
| No fix yet |
Description
Summary
Shared-base sessions were granted the same base-member capabilities as authenticated viewers. Using only the shared-base UUID (xc-shared-base-id), an attacker could enumerate base members and invite an arbitrary email into the base as a real member. The invited user could then redeem the invite via the normal signup flow and retain authenticated access even after the owner revoked the shared link.
Details
Shared-base sessions were mapped to ProjectRoles.VIEWER in packages/nocodb/src/strategies/base-view.strategy/base-view.strategy.ts, and packages/nocodb/src/utils/acl.ts granted baseUserList and userInvite to that role. The shared frontend (packages/nc-gui/composables/useApi/interceptors.ts) deliberately removed auth headers in favour of the shared-base header, but the ACL middleware did not distinguish shared sessions from genuine viewers.
The end-to-end chain:
GET /api/v2/meta/bases/:baseId/users returned the member list to shared-base callers (@Acl('baseUserList')).POST /api/v2/meta/bases/:baseId/users accepted an invite from shared-base callers (@Acl('userInvite')); base-users.service.ts inserted a real nc_users_v2 row with invite_token and a nc_base_users_v2 row for the target base, with invited_by = null.- The invited account redeemed the invite through the normal signup path (
users.service.ts), gaining a persistent JWT scoped to the base.
- Revoking the shared link did not affect the redeemed account.
Impact
- Confidentiality: shared-base link exposes member email addresses.
- Integrity: shared-base link can mutate base ACL state by creating new members.
- Persistence: link-based access converts into durable authenticated access that survives revocation of the share.
Credit
This issue was reported by @0xmrma.
NVD description
NocoDB is software for building databases as spreadsheets. Prior to 2026.04.1, shared-base sessions were granted the same base-member capabilities as authenticated viewers. Using only the shared-base UUID (xc-shared-base-id), an attacker could enumerate base members and invite an arbitrary email into the base as a real member. The invited user could then redeem the invite via the normal signup flow and retain authenticated access even after the owner revoked the shared link. Shared-base sessions were mapped to ProjectRoles.VIEWER in packages/nocodb/src/strategies/base-view.strategy/base-view.strategy.ts, and packages/nocodb/src/utils/acl.ts granted baseUserList and userInvite to that role. The shared frontend (packages/nc-gui/composables/useApi/interceptors.ts) deliberately removed auth headers in favour of the shared-base header, but the ACL middleware did not distinguish shared sessions from genuine viewers. This vulnerability is fixed in 2026.04.1.
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