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Vulnerabilities

Vulnerability · CVE-2026-104895

Memory Allocation with Excessive Size Value

Published Oct 28, 2026 · Memory Allocation with Excessive

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-104895. EPSS is 0.38%. Act only if a listed version of Memory Allocation with Excessive is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Memory Allocation with Excessive).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Not established
Affected products
package maven

The asynchronous Smile parser (NonBlockingByteArrayParser) uses a raw-binary length prefix taken from untrusted input to allocate a byte[] before the body is read, with no upper bound and no overflow check. On the raw-binary marker 0xFD, _decodeVInt() computes (value >> 25) != 0 overflow guard present in the blocking SmileParser._readUnsignedVInt, and _startRawBinary then allocates the declared length immediately. A Smile feed of roughly ten bytes can therefore force an eager allocation of approximately 2 GB, producing an OutOfMemoryError on reactive or asynchronous Smile endpoints. A VInt crafted to overflow int yields a negative length and a NegativeArraySizeException, a RuntimeException that is not a JacksonException and so escapes the parser contract. Either outcome crashes the request

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • package mavenversion unspecified

How to fix CVE-2026-104895

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-104895. EPSS is 0.38%. Act only if a listed version of Memory Allocation with Excessive is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · Tenable CVE Database

    Detected

    The asynchronous Smile parser (NonBlockingByteArrayParser) uses a raw-binary length prefix taken from untrusted input to allocate a byte[] before the body is read, with no upper bound and no overflow check. On the raw-binary marker 0xFD, _decodeVInt() computes (value >> 25) != 0 overflow guard present in the blocking SmileParser._readUnsignedVInt, and _startRawBinary then allocates the declared le

Sources

  • CVE.orgVulnerability recordCVE-2026-104895

    Official CVE identifier

    cve.org
  • Snyk Vulnerability DatabasePackage advisorySNYK-JAVA-COMFASTERXMLJACKSONDATAFORMAT-21762812

    Memory Allocation with Excessive Size Value

    security.snyk.io
  • Snyk Vulnerability DatabasePackage advisorySNYK-JAVA-TOOLSJACKSONDATAFORMAT-21762813

    Memory Allocation with Excessive Size Value

    security.snyk.io
  • Tenable CVE DatabaseVulnerability recordCVE-2026-104895

    The asynchronous Smile parser (NonBlockingByteArrayParser) uses a raw-binary length prefix taken from untrusted input to allocate a byte[] before the body is read, with no upper bound and no overflow check. On the raw-binary marker 0xFD, _decodeVInt() computes (value >> 25) != 0 overflow guard present in the blocking SmileParser._readUnsignedVInt, and _startRawBinary then allocates the declared le

    tenable.com

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Snyk Vulnerability DatabaseOct 31, 2026
  • Snyk Vulnerability DatabaseOct 31, 2026
  • CVE.orgOct 28, 2026
  • Tenable CVE DatabaseOct 28, 2026