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CVE-2026-113666

HIGH 7.1

Published 2026-10-20 · Last modified 2026-10-20

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.

ELEVATED IMPACT

Severe if exploited (CVSS 7.1), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 38th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

7.1CVSS 3.1 · HIGH

  • ConfidentialityNone
  • IntegrityLow
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Apostrophecms @Apostrophecms

Products Apostrophe Db Connect

Weakness (CWE)

  • CWE-400: : Uncontrolled Resource Consumption
  • CWE-1321: : Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • @apostrophecms/db-connect npm

    pkg:npm/%40apostrophecms/db-connect

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.1.0
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-j5rq-xfvr-p969/GHSA-j5rq-xfvr-p969.json"
  }
}
    GitHub Advisory Database · GHSA-j5rq-xfvr-p969 · Updated 2026-10-20T18:15:04.524962165Z
  • apostrophe npm

    pkg:npm/apostrophe

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 4.33.0
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-j5rq-xfvr-p969/GHSA-j5rq-xfvr-p969.json"
  }
}
    GitHub Advisory Database · GHSA-j5rq-xfvr-p969 · Updated 2026-10-20T18:15:04.524962165Z

All CVSS metrics

  • HIGH 7.1 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
  • HIGH 7.1 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS