CVE-2026-85786

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    CVE-2026-85786

    Published: 4 Sept 2026Last Modified: 10 Sept 2026

    Summary: Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java

    Details: Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936. To remediate this issue, users should upgrade to version 1.12.1.

    References: https://aws.amazon.com/security/security-bulletins/2026-100-aws/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85786.json, https://nvd.nist.gov/vuln/detail/CVE-2026-85786, https://github.com/amazon-ion/ion-java/releases/tag/v1.12.1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -5210061946558b1768fa2d419c80491760795751

    Affected versions

    v1.12.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-85786 | CVE-DB