CVE-2026-113666 ApostropheCMS: Authenticated projection-exclusion prototype-member deletion in @apostrophecms/db-connect causes process-wide denial of service
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-113666?
CVE-2026-113666 is a high-severity vulnerability in @apostrophecms apostrophe, published on 20 Oct 2026.
Official description
ApostropheCMS is an open-source Node.js content management system. Prior to 1.1.0 of db-connect and 4.33.0 of ApostropheCMS, an account with view-draft access can submit a projection exclusion path that traverses through a constructor prototype chain to a shared prototype member when a consumer uses a SQLite, PostgreSQL, or multipostgres adapter and has a matching document. Every editing role has view-draft access, while guestApiAccess broadens this prerequisite to any logged-in account. The unsetNestedField helper then deletes the shared runtime member, causing persistent process-wide integrity and availability effects; the default MongoDB adapter is not affected. This issue is fixed in db-connect 1.1.0 and ApostropheCMS 4.33.0.
Which versions are affected by CVE-2026-113666?
4 open source packages ship an affected version, including @apostrophecms/db-connect and apostrophe.
| Package | Affected | Fixed in |
|---|---|---|
@apostrophecms/db-connect npm | All versions | 1.1.0 |
@apostrophecms/db-connect npm | All versions | 1.1.0 |
apostrophe npm | All versions | 4.33.0 |
apostrophe npm | All versions | 4.33.0 |
How do I fix CVE-2026-113666?
Upgrade @apostrophecms/db-connect to 1.1.0 or later.
Is CVE-2026-113666 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-113666 exists.
Sources
Also known as GHSA-j5rq-xfvr-p969.