CVE-2026-114644— Memory-exhaustion denial of service via unbounded symbol interning during BSON/JSON deserialization
Quick assessment
Affected
MongoDB C# Driver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
MongoDB C驱动程序的 BSON 库在其对一种 BSON 值类型的反序列化处理中存在不受控的资源消耗缺陷。使用该库对不可信内容进行反序列化的应用程序，会将从该内容派生的数据保留至整个进程的生命周期，且对累积的数据量没有限制。任何能够触发此类内容反序列化的未认证远程攻击者，均可导致内存无限制增长，耗尽宿主应用程序的可用内存，从而引发拒绝服务（DoS）。该漏洞不影响机密性或完整性，且不影响 MongoDB 服务器的任何组件。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-114644
Vulnerability Information
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Vulnerability Title
Memory-exhaustion denial of service via unbounded symbol interning during BSON/JSON deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
The MongoDB C# Driver's BSON library contains an uncontrolled resource consumption weakness in its deserialization handling of one BSON value type. An application that deserializes untrusted content with the library retains data derived from that content for the lifetime of the process, with no limit on how much accumulates. An unauthenticated remote party who can cause such content to be deserialized can drive unbounded memory growth, exhausting the host application's available memory and denying service. There is no impact to confidentiality or integrity, and no MongoDB server component is affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-114644
| # | POC Description | Source Link | Shenlong Link |
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Other References for CVE-2026-114644 (3)
Same Patch Batch · MongoDB · 2026-10-22 · 13 CVEs total
| CVE-2026-114648 | 7.6 HIGH | NoSQL injection via dot and dollar characters in LINQ filter field names and dictionary ke |
| CVE-2026-114649 | 6.8 MEDIUM | Authentication bypass via issuer-and-serial-only certificate equality in shared cluster ca |
| CVE-2026-114652 | 6.5 MEDIUM | Update operator injection via single-element list rewriting in the update builder |
| CVE-2026-114646 | 6.5 MEDIUM | NoSQL command injection via mismatched raw BSON length prefix written verbatim to the wire |
| CVE-2026-114654 | 6.5 MEDIUM | BSON output corruption via out-of-range binary subtype bypassing UUID and OldBinary guards |
| CVE-2026-114653 | 6.5 MEDIUM | Silent client-side encryption bypass via unescaped field-name regex in CSFLE schema builde |
| CVE-2026-114655 | 5.9 MEDIUM | KMS request injection via unsanitized key vault and provider values in libmongocrypt |
| CVE-2026-114650 | 5.9 MEDIUM | Plaintext exposure of encrypted fields via ANSI code-page corruption of database name |
| CVE-2026-114643 | 5.4 MEDIUM | Duplicate geometry fields via unvalidated GeoJSON extra members |
| CVE-2026-114645 | 5.2 MEDIUM | Heap overflow via 32-bit length wrap of the URI username in Windows Kerberos auth message |
| CVE-2026-114647 | 4.3 MEDIUM | NoSQL operator injection via unvalidated replacement document in findOneAndReplace |
| CVE-2026-114651 | 4.0 MEDIUM | Cross-document data leak via malformed BSON array parsing in reused thread buffer |
IV. Related Vulnerabilities
Same product: C# Driver
-
CVE-2026-114654
BSON output corruption via out-of-range binary subtype bypas -
CVE-2026-114653
Silent client-side encryption bypass via unescaped field-nam -
CVE-2026-114652
Update operator injection via single-element list rewriting -
CVE-2026-114651
Cross-document data leak via malformed BSON array parsing in -
CVE-2026-114650
Plaintext exposure of encrypted fields via ANSI code-page co
Same vendor: MongoDB
-
CVE-2026-114655
KMS request injection via unsanitized key vault and provider -
CVE-2026-114654
BSON output corruption via out-of-range binary subtype bypas -
CVE-2026-114653
Silent client-side encryption bypass via unescaped field-nam -
CVE-2026-114652
Update operator injection via single-element list rewriting -
CVE-2026-114651
Cross-document data leak via malformed BSON array parsing in
Same weakness: CWE-770
-
CVE-2026-115398
Ghidra before 12.2 Denial of Service via TAR and ZIP File Sy -
CVE-2026-115397
Ghidra before 12.2 Denial of Service via Extension Archive I -
CVE-2026-115395
Ghidra 10.3 before 12.2 Denial of Service via ThemeReader.re -
CVE-2026-115391
Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 Unbou -
CVE-2026-115389
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 be
V. Comments for CVE-2026-114644
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