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OpenAdvisories
High ALAS2-2026-4098 2 CVEs

Important: jackson security update (Amazon Linux 2)

Published Nov 12, 2026 · Updated Nov 12, 2026

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-95155: FasterXML Jackson 1.x, confirmed in jackson-mapper-asl versions 1.8.3, 1.9.2, 1.9.11, 1.9.12, and 1.9.13, allows attackers to cause a denial of service by supplying deeply nested JSON input to an application that deserializes untrusted JSON using ObjectMapper.readValue. CVE-2025-52999: jackson-core contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. In versions prior to 2.15.0, if a user parses an input file and it has deeply nested data, Jackson could end up throwing a StackoverflowError if the depth is particularly large. jackson-core 2.15.0 contains a configurable limit for how deep Jackson will traverse in an input document, defaulting to an allowable depth of 1000. jackson-core will throw a StreamConstraintsException if the limit is reached. jackson-databind also benefits from this change because it uses jackson-core to parse JSON inputs. As a workaround, users should avoid parsing input files from untrusted sources.

Fixed packages 2

ReleasePackageFixed in
Amazon Linux · 2 jackson 0:1.9.4-7.amzn2.0.1
Amazon Linux · 2 jackson-javadoc 0:1.9.4-7.amzn2.0.1

Vulnerabilities 2

  • High 8.7
    CVE-2025-52999 Public exploit

    jackson-core Has Potential for StackoverflowError if user parses an input file that contains very deeply nested data

    jackson-core contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. In versions prior to 2.15.0, if a user parses an input file and it has deeply nested data, Jackson could end up throwing a Stackov…

  • High 7.5

    FasterXML Jackson 1.x, confirmed in jackson-mapper-asl versions 1.8.3, 1.9.2, 1.9.11, 1.9.12, and 1.9.13, allows attack…

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-52999.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-95155.html