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Vulnerabilities

Vulnerability · CVE-2026-103005

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130).

Published Oct 6, 2026 · catalog updated Oct 9, 2026 · Memory Allocation with Excessive

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-103005. EPSS is 0.31%. 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 vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Version ranges on file
Affected products
cpe elastic/elasticsearch

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large field are created and subsequently accessed, exhausting available heap memory and crashing the affected node.

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.

  • cpe elastic/elasticsearch< 8.19.23
  • cpe elastic/elasticsearch< 9.4.8
  • cpe elastic/elasticsearch< 9.5.5
  • cpe elastic/elasticsearch>= 9.0.0, <= 9.3.8

How to fix CVE-2026-103005

  • Upgrade

    CVE-2026-103005 lists a fix boundary at 8.19.23. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 8.19.23

  • Advisory

    Open the inventory_high record and follow its fix.

  • Official advisories

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-2026-103005. EPSS is 0.31%. Act only if a listed version of Memory Allocation with Excessive is installed.

Which versions are affected?

Compare what you have installed with < 8.19.23, < 9.4.8, < 9.5.5, >= 9.0.0, <= 9.3.8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-789. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Elasticsearch security

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 6, 2026 · Monitored products — high

    Detected

    Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large field are created and subsequently accessed, exhausting available heap memory and

  2. Oct 9, 2026 · Monitored products — high

    Updated

    Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large field are created and subsequently accessed, exhausting available heap memory and

Sources

  • Monitored products — highVendor advisoryCVE-2026-103005

    Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large field are created and subsequently accessed, exhausting available heap memory and

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — highNov 2, 2026