Description
The explicit decryption component of MongoDB libmongocrypt can return an unrecognized encrypted payload unchanged instead of returning a decryption error. An actor who can modify stored encrypted fields, such as a database writer, server, or network intermediary, can cause an affected application to process the supplied bytes as decrypted plaintext.
Published: 2026-10-08
Score: 5.3 Medium
EPSS: n/a
KEV: No
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Remediation

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History

Thu, 08 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description The explicit decryption component of MongoDB libmongocrypt can return an unrecognized encrypted payload unchanged instead of returning a decryption error. An actor who can modify stored encrypted fields, such as a database writer, server, or network intermediary, can cause an affected application to process the supplied bytes as decrypted plaintext.
Title Unrecognized payload acceptance in explicit decryption in MongoDB libmongocrypt
Weaknesses CWE-354
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-10-08T19:30:49.513Z

Reserved: 2026-10-06T16:40:35.016Z

Link: CVE-2026-106434

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T19:16:59.390

Modified: 2026-10-08T19:16:59.390

Link: CVE-2026-106434

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-354

    Improper Validation of Integrity Check Value