CVE-2026-75935

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.

CVSS Vector

References

• https://aws.amazon.com/security/security-bulletins/2026-083-aws/
• https://github.com/amazon-ion/ion-java/releases/tag/v1.12.0
• https://github.com/amazon-ion/ion-java/security/advisories/GHSA-822f-6gg9-whr5