[Snyk] Security upgrade com.fasterxml.jackson.core:jackson-databind from 2.14.2 to 2.18.10

[caniszczyk]

Snyk has created this PR to fix 1 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• functions-framework-invoker/pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	Deserialization of Untrusted Data SNYK-JAVA-COMFASTERXMLJACKSONCORE-19496766	708	com.fasterxml.jackson.core:jackson-databind: 2.14.2 -> 2.18.10 Proof of Concept

Breaking Change Risk

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🦉 Deserialization of Untrusted Data

[caniszczyk]

This upgrade from Jackson-databind 2.14.2 to 2.18.10 spans multiple minor versions and introduces several behavioral changes and new features that warrant verification.

Key Changes:

• Stricter Deserialization Defaults: To address security concerns, newer versions introduce stricter default limits and behaviors.
  • Processing Limits (2.15+): New default constraints have been added for maximum input nesting depth (1000 levels), string value length, and number token lengths to prevent Denial of Service (DoS) attacks from deeply nested or large JSON inputs.
  • Stricter Number Coercion (2.17+): Strings with leading zeroes (e.g., "07") are no longer recognized as coercible numbers for enums or other types.
• Behavioral Changes:
  • Locale Deserialization (2.16+): Deserializing an empty string for java.util.Locale now results in Locale.ROOT instead of null, even when ACCEPT_EMPTY_STRING_AS_NULL_OBJECT is enabled.
  • @JsonIgnore Precedence (2.14): In case of conflicting annotations, @JsonIgnore now takes precedence over @JsonProperty, which may change serialization behavior for inherited properties.
• Kotlin Support: Support for Kotlin versions has been updated. Version 2.16 requires Kotlin 1.6-1.9, and 2.18 drops support for Kotlin 1.7.
• Deprecations:
  • DefaultTyping.EVERYTHING is deprecated in 2.17 and will be removed in version 3.0.

Recommendation:

Given the introduction of stricter processing limits and subtle changes in deserialization behavior, it is important to verify that your application's JSON/object mapping logic is unaffected. Pay close attention to code that relies on:

• Deserializing very large or deeply nested JSON documents.
• Type coercion from strings with leading zeroes to numbers.
• The specific behavior of Locale deserialization from empty strings.

Source: Jackson 2.15 Release Notes, Jackson 2.16 Release Notes, Jackson 2.17 Release Notes

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

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