Improper Handling of Case Sensitivity Affecting datadog-agent-7-oci-compat package, versions <7.76.1-r2


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.07% (22nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-MINIMOSLATEST-DATADOGAGENT7OCICOMPAT-15363899
  • published28 Feb 2026
  • disclosed26 Feb 2026

Introduced: 26 Feb 2026

CVE-2026-27896  (opens in a new tab)
CWE-178  (opens in a new tab)
CWE-436  (opens in a new tab)

How to fix?

Upgrade Minimos:latest datadog-agent-7-oci-compat to version 7.76.1-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream datadog-agent-7-oci-compat package and not the datadog-agent-7-oci-compat package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

The Go MCP SDK used Go's standard encoding/json.Unmarshal for JSON-RPC and MCP protocol message parsing in versions prior to 1.3.1. Go's standard library performs case-insensitive matching of JSON keys to struct field tags — a field tagged json:"method" would also match "Method", "METHOD", etc. This violated the JSON-RPC 2.0 specification, which defines exact field names. A malicious MCP peer may have been able to send protocol messages with non-standard field casing that the SDK would silently accept. This had the potential for bypassing intermediary inspection and coss-implementation inconsistency. Go's standard JSON unmarshaling was replaced with a case-sensitive decoder in commit 7b8d81c. Users are advised to update to v1.3.1 to resolve this issue.

CVSS Base Scores

version 3.1