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Back to active CVEs
High · CVSS 8.1CVE-2026-90800

Apache CouchDB: Auth bypass in prefixed _users and _replicator databasesCVE-2026-90800

Answer in brief

CVE-2026-90800 records a High severity (CVSS 8.1) vulnerability in Apache CouchDB: Auth bypass in prefixed _users and _replicator databases. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache CouchDB (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 20, 2026Updated Oct 20, 2026Source checked Oct 20, 2026First seen by HOL Oct 20, 2026Material review Oct 20, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache CouchDB (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache Software Foundation/Apache CouchDBgeneric>=0 <3.5.33.5.3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache CouchDB.
  2. 2Review the reported fix. Update Apache Software Foundation/Apache CouchDB to 3.5.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 20, 2026

Sources and claim methodology

  • Source referencelists.apache.org
  • Source referencelists.apache.org
Upstream source description

Missing authorisation checks in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows any request to read the full contents of a prefixed _user or _replicator database via an unauthorised API endpoint. The use of prefixed system databases is very rare. Users are recommended to upgrade to version 3.5.3, which fixes this issue.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Apache CouchDB: Credential Disclosure to Non-Owner Members via Object-Form Replication Endpoint URLsSame apache software foundation/apache couchdb package
  • ApostropheCMS: GET /api/v1/@apostrophecms/page/:id bypasses viewRole restriction and exposes viewPermission-gated fields to lower-privileged usersAlso CWE-862
  • ApostropheCMS: Missing Authentication in `cleanExport` RouteAlso CWE-862
  • ApostropheCMS: Import API bypasses publication roles for protected contentAlso CWE-862
  • ApostropheCMS: Same-parent page reorder in @apostrophecms/page move() re-ranks a restricted parent's children without create authorizationAlso CWE-862
  • ApostropheCMS: Authenticated Object-Level Authorization Bypass in exist-in-locale Reveals Restricted Localized Draft IdentifiersAlso CWE-862

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-862
Source
CVE List V5
Source checked
Oct 20, 2026
References
2 linked sources
Open source record