CVE-2026-85786

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Source
https://cve.org/CVERecord?id=CVE-2026-85786
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85786.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-85786
Published
2026-09-04T19:19:32.274Z
Modified
2026-09-06T03:47:20.370168528Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
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.

Database specific 
{
    "cwe_ids": [
        "CWE-409"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85786.json",
    "cna_assigner": "AMZN"
}
References

Affected packages

Git / github.com/amazon-ion/ion-java

Affected ranges

Type
GIT
Repo
https://github.com/amazon-ion/ion-java
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5210061946558b1768fa2d419c80491760795751
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.12.1"
        }
    ]
}

Affected versions

com_amazon_ion_v1.*
com_amazon_ion_v1.4.0
com_amazon_ion_v1.5.0
com_amazon_ion_v1.5.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.1.2
v1.10.0
v1.10.1
v1.10.2
v1.10.3
v1.10.4
v1.10.5
v1.11.0
v1.11.11
v1.12.0
v1.2.0
v1.3.0
v1.3.1
v1.6.0
v1.6.1
v1.7.0
v1.7.1
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.9.0
v1.9.1
v1.9.3
v1.9.4
v1.9.5
v1.9.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85786.json"