What is CVE-2026-75935?

CVE-2026-75935 is a high-severity vulnerability in Amazon Ion Java, classified under CWE-789. CVSS score: 7.5/10. Published 2026-08-18.

How severe is CVE-2026-75935?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Amazon Ion Java

CVE-2026-75935

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.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Amazon Ion Java

Weakness classification (CWE)

CWE-789

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)

Frequently asked questions

What is CVE-2026-75935?: CVE-2026-75935 is a high-severity vulnerability in Amazon Ion Java, classified under CWE-789. CVSS score: 7.5/10. Published 2026-08-18.
How severe is CVE-2026-75935?: High severity. CVSS v3 base score is 7.5 out of 10.