CVE-2026-75935CWE-789

CVE-2026-75935

High · published August 19, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
48.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00609 · 48.5th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-08-19T00:17Z
References (3)
https://aws.amazon.com/security/security-bulletins/2026-083-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/amazon-ion/ion-java/releases/tag/v1.12.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/amazon-ion/ion-java/security/advisories/GHSA-822f-6gg9-whr5 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 18 AUG 19:33Z
    Memory-amplification denial of service via declared-length preallocation in Amazon ion-java
    cvelistv5