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CVE-2026-2303— Heap Out-of-Bounds Read in Go Driver GSSAPI C Wrappers enables application crash or information leak

CVSS 6.5 · Medium EPSS 0.06% · P20
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I. Basic Information for CVE-2026-2303

Vulnerability Information
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Vulnerability Title
Heap Out-of-Bounds Read in Go Driver GSSAPI C Wrappers enables application crash or information leak
Source: NVD (National Vulnerability Database)
Vulnerability Description
The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap out-of-bounds read vulnerability due to incorrect assumptions about string termination in the GSSAPI standard. Since GSSAPI buffers are not guaranteed to be null-terminated or have extra padding, this results in reading one byte past the allocated heap buffer.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
宽松定义的白名单
Source: NVD (National Vulnerability Database)
Vulnerability Title
MongoDB Go Driver 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB Go Driver是MongoDB开源的一个Go语言库。 MongoDB Go Driver存在安全漏洞，该漏洞源于C包装器实现中对GSSAPI标准字符串终止的假设不正确，可能导致堆越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
MongoDB IncMongoDB Go Driver 1.0.0 ~ 1.17.7 -

II. Public POCs for CVE-2026-2303

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III. Intelligence Information for CVE-2026-2303

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Same Patch Batch · MongoDB Inc · 2026-02-10 · 11 CVEs total

CVE-2026-256117.5 HIGHPre-Authentication Memory Exhaustion Denial of Service in MongoDB Server
CVE-2026-18487.5 HIGHConnections received from the proxy port may not count towards total accepted connections
CVE-2026-256126.5 MEDIUMInternal ResourceId collision may affect unrelated collections
CVE-2026-256136.5 MEDIUMAn unsafe cast in the MongoDB query planner can result in a segmentation fault.
CVE-2026-256106.5 MEDIUMInvalid $geoNear index hint may cause server crash
CVE-2026-18506.5 MEDIUMAn authorized user may disable the MongoDB server by issuing a certain type of complex que
CVE-2026-18476.5 MEDIUMMongoDB Server may crash when inserting large documents
CVE-2026-18496.5 MEDIUMMongod can run out of stack memory when expressions create deeply nested documents
CVE-2026-23026.5 MEDIUMUnsafe Reflection in Mongoid::Criteria.from_hash
CVE-2026-256095.4 MEDIUMprofile command may permit unauthorized configuration

IV. Related Vulnerabilities

Same product: MongoDB Go Driver
Same vendor: MongoDB Inc
Same weakness: CWE-183

V. Comments for CVE-2026-2303

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