Heap Out-of-Bounds Read in MongoDB Go Driver GSSAPI Implementation
CVE-2026-2303

6.9MEDIUM

Key Information:

Vendor

MongoDB
Status
Mongodb Go Driver
Vendor
CVE Published:
10 February 2026

What is CVE-2026-2303?

The mongo-go-driver repository includes CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. Within this implementation, a vulnerability has been identified as a heap out-of-bounds read. This arises from assumptions regarding string termination in the GSSAPI standard. Specifically, the GSSAPI buffers do not guarantee null-termination or extra padding, potentially leading to a read operation that exceeds the bounds of the allocated heap buffer. Users are advised to assess their applications for exposure to this issue.

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Affected Version(s)

MongoDB Go Driver 1.0.0 < 1.17.7

MongoDB Go Driver 2.0.0 < 2.4.2

References

https://jira.mongodb.org/browse/GODRIVER-3770

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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