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  4. CVE 2026 75936 memory amplification denial of service via gzip
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Back to active CVEs
High · CVSS 7.5CVE-2026-75936

Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java

Answer in brief

CVE-2026-75936 records a High severity (CVSS 7.5) vulnerability in Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java. The current sources do not mark it as known exploited. The current feed maps Amazon Ion/Amazon Ion Java (generic), Amazon Ion/Amazon Ion Java (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 18, 2026Updated Aug 20, 2026Source checked Oct 3, 2026First seen by HOL Aug 18, 2026Material review Aug 20, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Amazon Ion/Amazon Ion Java (generic), Amazon Ion/Amazon Ion Java (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Amazon Ion/Amazon Ion Javageneric>=1.9.0 <1.12.01.12.0
Amazon Ion/Amazon Ion Javageneric>=0 <1.12.01.12.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Amazon Ion/Amazon Ion Java, Amazon Ion/Amazon Ion Java.
  2. 2Review the reported fix. Update Amazon Ion/Amazon Ion Java to 1.12.0; Amazon Ion/Amazon Ion Java to 1.12.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 18, 2026

Sources and claim methodology

  • Source referenceaws.amazon.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

Improper handling of highly compressed data in the GZIP auto-decompression handler in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression. To remediate this issue, users should upgrade to version 1.12.0 and configure withGzipDecompressionEnabled(false) and/or set an explicit withMaximumBufferSize() when parsing untrusted input.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • CodeArt Google MP3 Audio Player 1.0.11 Arbitrary File Read via direct_download.phpSame generic ecosystem
  • Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFileSame generic ecosystem
  • H3C CVM Unauthenticated File Upload via fileUpload/upload TokenSame generic ecosystem
  • @orpc/json-schema: Prototype injection in smart coercionSame generic ecosystem
  • @orpc/zod: Prototype injection in smart coercionSame generic ecosystem
  • Missing authentication for critical function in Loom for AWSSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-409
Source
CVE List V5
Source checked
Oct 3, 2026
References
3 linked sources
Open source record