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CVE-2026-106428— Out-of-bounds read in SCRAM response parsing in MongoDB C Driver

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.

在 MongoDB C 驱动程序的 SCRAM 身份验证响应解析过程中存在一个越界读取漏洞。在处理格式错误的服务器最终消息时，可能读取固定大小缓冲区之外的一字节。如果服务器或网络中间件能够在服务器签名验证之前提供此消息，则会导致使用该驱动程序的 application 终止。该额外字节不会通过协议返回。

CVSS 3.7 · Low

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
MongoDB C Driver 1.1.0< 1.30.13 affected
2.0.0< 2.4.0 affected
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I. Basic Information for CVE-2026-106428

Vulnerability Information
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Vulnerability Title
Out-of-bounds read in SCRAM response parsing in MongoDB C Driver
Source: CVE Program / CVE List V5
Vulnerability Description
An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.
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:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB C Driver 1.1.0 ~ 1.30.13 -

II. Public POCs for CVE-2026-106428

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III. Intelligence Information for CVE-2026-106428

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Other References for CVE-2026-106428 (1)

Same Patch Batch · MongoDB · 2026-10-08 · 13 CVEs total

CVE-2026-106433 8.8 HIGH Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt
CVE-2026-106429 6.5 MEDIUM Application denial of service via malformed KMS endpoint in MongoDB libmongocrypt
CVE-2026-106437 6.2 MEDIUM Out-of-bounds read and write via undersized BSON buffer reservation in MongoDB C Driver
CVE-2026-106430 5.9 MEDIUM Query and rename target confusion via embedded NUL truncation in MongoDB C++ Driver
CVE-2026-107325 5.9 MEDIUM Application denial of service via missing BSON array length validation in MongoDB Go Drive
CVE-2026-107324 5.9 MEDIUM Application denial of service via integer overflow in BSON value-length validation in Mong
CVE-2026-106431 5.7 MEDIUM One-byte heap buffer overflow in BSON bulk document writer in MongoDB C Driver
CVE-2026-106435 5.1 MEDIUM Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Pyt
CVE-2026-106436 4.8 MEDIUM Application denial of service and data truncation via unchecked BSON append failures in Mo
CVE-2026-106434 4.3 MEDIUM Unrecognized payload acceptance in explicit decryption in MongoDB libmongocrypt
CVE-2026-106438 4.0 MEDIUM Silent Decimal128 value corruption via incorrect exactness check in MongoDB C Driver
CVE-2026-106432 3.6 LOW Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver

IV. Related Vulnerabilities

Same product: C Driver
Same vendor: MongoDB
Same weakness: CWE-125

V. Comments for CVE-2026-106428

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