CVE-2026-75935

Memory-amplification denial of service via declared-length preallocation in Amazon ion-java

HIGH
7.5
CVSS Score
Published: August 18, 2026 at 07:33 PM UTC
Updated: October 22, 2026 at 10:10 PM UTC
1 product affected across 1 vendorIon Java

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation. To remediate this issue, users should upgrade to version 1.12.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.9.0 ≤ v < 1.12.01.9.0
Affected range stops below 1.12.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHAMZN
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-789

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