Interpretation Conflict Affecting github.com/segmentio/encoding/json package, versions <0.5.4
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- published20 Mar 2026
- disclosed19 Mar 2026
- creditFrancesco Lacerenza
Introduced: 19 Mar 2026
CVE NOT AVAILABLE CWE-1395 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade github.com/segmentio/encoding/json to version 0.5.4 or higher.
Overview
Affected versions of this package are vulnerable to Interpretation Conflict in the JSON parsing process. An attacker can manipulate message fields by appending null Unicode characters to keys, causing key collisions and overriding intended values by submitting specially crafted JSON objects with duplicate keys. This may allow bypassing of intermediary inspection or policy enforcement mechanisms and create inconsistencies across different SDK implementations.