CVE-2026-75935highCWE-789

CVE-2026-75935: high-severity vulnerability in Amazon Ion Java

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

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.6%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Amazon Ion · Amazon Ion Java
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CVE-2026-75936HIGHMemory-amplification denial of service via GZIP decompression bomb in Amazon ion-javaEPSS 0.6%