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Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corruption

Type: advisorySource: OSV1 source record

MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.

Announced Source revision 1
Original source ↗

BIT-mongodb-2026-18687

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:BIT-mongodb-2026-18687

mongodb

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
8.0.29

Source reference: /affected/0/ranges

8.3.8

Source reference: /affected/0/ranges

9.0.2

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "8.0.0"
          },
          {
            "fixed": "8.0.29"
          },
          {
            "introduced": "8.2.0"
          },
          {
            "fixed": "8.3.8"
          },
          {
            "introduced": "9.0.0"
          },
          {
            "fixed": "9.0.2"
          }
        ]
      }
    ],
    "package": {
      "name": "mongodb",
      "purl": "pkg:bitnami/mongodb",
      "ecosystem": "Bitnami"
    },
    "severity": [
      {
        "type": "CVSS_V4",
        "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/mongodb/BIT-mongodb-2026-18687.json"
    }
  }
]
Related CVEs
CVE-2026-18687

Source reference: /aliases

Publisher severity

high

Source reference: /database_specific/severity

Event
#59528 · Revision 1
Added to Heist Feed
Publisher date
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