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Vulnerable Software

Vulnerability Details CVE-2026-84971

Improper handling of an unexpected value size in the decryption path of a client-side encryption library can cause a failed internal check that terminates the process using the library. A party able to place a suitably formed encrypted value where an application will decrypt it, or able to control the responses the application receives, may cause that application to stop running.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.002

EPSS Ranking 5.5%

CVSS Severity

CVSS v3 Score 6.5

References

https://jira.mongodb.org/browse/MONGOCRYPT-971

Products affected by CVE-2026-84971

Mongodb » Libmongocrypt » Version: 1.10.0

cpe:2.3:a:mongodb:libmongocrypt:1.10.0
Mongodb » Libmongocrypt » Version: 1.10.1

cpe:2.3:a:mongodb:libmongocrypt:1.10.1
Mongodb » Libmongocrypt » Version: 1.11.0

cpe:2.3:a:mongodb:libmongocrypt:1.11.0
Mongodb » Libmongocrypt » Version: 1.12.0

cpe:2.3:a:mongodb:libmongocrypt:1.12.0
Mongodb » Libmongocrypt » Version: 1.13.0

cpe:2.3:a:mongodb:libmongocrypt:1.13.0
Mongodb » Libmongocrypt » Version: 1.13.1

cpe:2.3:a:mongodb:libmongocrypt:1.13.1
Mongodb » Libmongocrypt » Version: 1.13.2

cpe:2.3:a:mongodb:libmongocrypt:1.13.2
Mongodb » Libmongocrypt » Version: 1.14.0

cpe:2.3:a:mongodb:libmongocrypt:1.14.0
Mongodb » Libmongocrypt » Version: 1.14.1

cpe:2.3:a:mongodb:libmongocrypt:1.14.1
Mongodb » Libmongocrypt » Version: 1.15.0

cpe:2.3:a:mongodb:libmongocrypt:1.15.0
Mongodb » Libmongocrypt » Version: 1.15.1

cpe:2.3:a:mongodb:libmongocrypt:1.15.1
Mongodb » Libmongocrypt » Version: 1.15.2

cpe:2.3:a:mongodb:libmongocrypt:1.15.2
Mongodb » Libmongocrypt » Version: 1.16.0

cpe:2.3:a:mongodb:libmongocrypt:1.16.0
Mongodb » Libmongocrypt » Version: 1.17.0

cpe:2.3:a:mongodb:libmongocrypt:1.17.0
Mongodb » Libmongocrypt » Version: 1.17.1

cpe:2.3:a:mongodb:libmongocrypt:1.17.1
Mongodb » Libmongocrypt » Version: 1.17.2

cpe:2.3:a:mongodb:libmongocrypt:1.17.2
Mongodb » Libmongocrypt » Version: 1.17.3

cpe:2.3:a:mongodb:libmongocrypt:1.17.3
Mongodb » Libmongocrypt » Version: 1.18.0

cpe:2.3:a:mongodb:libmongocrypt:1.18.0
Mongodb » Libmongocrypt » Version: 1.18.1

cpe:2.3:a:mongodb:libmongocrypt:1.18.1
Mongodb » Libmongocrypt » Version: 1.18.2

cpe:2.3:a:mongodb:libmongocrypt:1.18.2
Mongodb » Libmongocrypt » Version: 1.19.0

cpe:2.3:a:mongodb:libmongocrypt:1.19.0
Mongodb » Libmongocrypt » Version: 1.19.1

cpe:2.3:a:mongodb:libmongocrypt:1.19.1
Mongodb » Libmongocrypt » Version: 1.19.2

cpe:2.3:a:mongodb:libmongocrypt:1.19.2
Mongodb » Libmongocrypt » Version: 1.20.0

cpe:2.3:a:mongodb:libmongocrypt:1.20.0
Mongodb » Libmongocrypt » Version: 1.20.1

cpe:2.3:a:mongodb:libmongocrypt:1.20.1
Mongodb » Libmongocrypt » Version: 1.20.2

cpe:2.3:a:mongodb:libmongocrypt:1.20.2
Mongodb » Libmongocrypt » Version: 1.20.3

cpe:2.3:a:mongodb:libmongocrypt:1.20.3
Mongodb » Libmongocrypt » Version: 1.7.0

cpe:2.3:a:mongodb:libmongocrypt:1.7.0
Mongodb » Libmongocrypt » Version: 1.7.1

cpe:2.3:a:mongodb:libmongocrypt:1.7.1
Mongodb » Libmongocrypt » Version: 1.7.2

cpe:2.3:a:mongodb:libmongocrypt:1.7.2
Mongodb » Libmongocrypt » Version: 1.7.3

cpe:2.3:a:mongodb:libmongocrypt:1.7.3
Mongodb » Libmongocrypt » Version: 1.7.4

cpe:2.3:a:mongodb:libmongocrypt:1.7.4
Mongodb » Libmongocrypt » Version: 1.8.0

cpe:2.3:a:mongodb:libmongocrypt:1.8.0
Mongodb » Libmongocrypt » Version: 1.8.1

cpe:2.3:a:mongodb:libmongocrypt:1.8.1
Mongodb » Libmongocrypt » Version: 1.8.2

cpe:2.3:a:mongodb:libmongocrypt:1.8.2
Mongodb » Libmongocrypt » Version: 1.8.3

cpe:2.3:a:mongodb:libmongocrypt:1.8.3
Mongodb » Libmongocrypt » Version: 1.8.4

cpe:2.3:a:mongodb:libmongocrypt:1.8.4
Mongodb » Libmongocrypt » Version: 1.9.0

cpe:2.3:a:mongodb:libmongocrypt:1.9.0
Mongodb » Libmongocrypt » Version: 1.9.1

cpe:2.3:a:mongodb:libmongocrypt:1.9.1

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Vulnerability Details CVE-2026-84971

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