CVE-2026-75935

Summary

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 Software

Weaknesses

• CWE-789: CWE-789 Memory allocation with excessive size value

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

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

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