CVE-2026-75936
GZIP auto-decompression in amazon-ion-java allows decompression-bomb DoS.
Is CVE-2026-75936 being exploited?
Not confirmed. CVE-2026-75936 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-75936?
CVE-2026-75936 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-75936?
Yes. A fix has been recorded for CVE-2026-75936. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-75936 affect?
CVE-2026-75936 affects amazon-ion-java <1.12.0, Java applications using ion-java, Services parsing untrusted Ion documents. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-75936?
Upgrade to ion-java 1.12.0; disable Gzip decompression or set withMaximumBufferSize for untrusted input.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can send a crafted GZIPped Ion document that expands arbitrarily, causing memory/disk exhaustion and service denial of service.
Patch when possible
- affected< 1.12.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.