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Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-72687

A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single small request containing a forged opaque identifier. Elasticsearch decodes and deserializes the identifier before confirming that it was legitimately issued by the cluster, and a size value carried inside the identifier drives an allocation that is neither capped nor accounted for by the available memory-usage controls. The resulting out-of-memory condition is fatal and terminates the affected node process, resulting in a denial of service.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.003

EPSS Ranking 21.1%

CVSS Severity

CVSS v3 Score 6.5

References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-79/389506

Products affected by CVE-2026-72687

Elastic » Elasticsearch » Version: 8.0.0

cpe:2.3:a:elastic:elasticsearch:8.0.0
Elastic » Elasticsearch » Version: 8.0.1

cpe:2.3:a:elastic:elasticsearch:8.0.1
Elastic » Elasticsearch » Version: 8.1.0

cpe:2.3:a:elastic:elasticsearch:8.1.0
Elastic » Elasticsearch » Version: 8.1.1

cpe:2.3:a:elastic:elasticsearch:8.1.1
Elastic » Elasticsearch » Version: 8.1.2

cpe:2.3:a:elastic:elasticsearch:8.1.2
Elastic » Elasticsearch » Version: 8.1.3

cpe:2.3:a:elastic:elasticsearch:8.1.3
Elastic » Elasticsearch » Version: 8.10.0

cpe:2.3:a:elastic:elasticsearch:8.10.0
Elastic » Elasticsearch » Version: 8.10.1

cpe:2.3:a:elastic:elasticsearch:8.10.1
Elastic » Elasticsearch » Version: 8.10.2

cpe:2.3:a:elastic:elasticsearch:8.10.2
Elastic » Elasticsearch » Version: 8.10.3

cpe:2.3:a:elastic:elasticsearch:8.10.3
Elastic » Elasticsearch » Version: 8.10.4

cpe:2.3:a:elastic:elasticsearch:8.10.4
Elastic » Elasticsearch » Version: 8.11.0

cpe:2.3:a:elastic:elasticsearch:8.11.0
Elastic » Elasticsearch » Version: 8.11.1

cpe:2.3:a:elastic:elasticsearch:8.11.1
Elastic » Elasticsearch » Version: 8.11.2

cpe:2.3:a:elastic:elasticsearch:8.11.2
Elastic » Elasticsearch » Version: 8.11.3

cpe:2.3:a:elastic:elasticsearch:8.11.3
Elastic » Elasticsearch » Version: 8.11.4

cpe:2.3:a:elastic:elasticsearch:8.11.4
Elastic » Elasticsearch » Version: 8.12.0

cpe:2.3:a:elastic:elasticsearch:8.12.0
Elastic » Elasticsearch » Version: 8.12.1

cpe:2.3:a:elastic:elasticsearch:8.12.1
Elastic » Elasticsearch » Version: 8.12.2

cpe:2.3:a:elastic:elasticsearch:8.12.2
Elastic » Elasticsearch » Version: 8.13.0

cpe:2.3:a:elastic:elasticsearch:8.13.0
Elastic » Elasticsearch » Version: 8.13.1

cpe:2.3:a:elastic:elasticsearch:8.13.1
Elastic » Elasticsearch » Version: 8.13.2

cpe:2.3:a:elastic:elasticsearch:8.13.2
Elastic » Elasticsearch » Version: 8.13.3

cpe:2.3:a:elastic:elasticsearch:8.13.3
Elastic » Elasticsearch » Version: 8.13.4

cpe:2.3:a:elastic:elasticsearch:8.13.4
Elastic » Elasticsearch » Version: 8.14.0

cpe:2.3:a:elastic:elasticsearch:8.14.0
Elastic » Elasticsearch » Version: 8.14.1

cpe:2.3:a:elastic:elasticsearch:8.14.1
Elastic » Elasticsearch » Version: 8.14.2

cpe:2.3:a:elastic:elasticsearch:8.14.2
Elastic » Elasticsearch » Version: 8.14.3

cpe:2.3:a:elastic:elasticsearch:8.14.3
Elastic » Elasticsearch » Version: 8.15.0

cpe:2.3:a:elastic:elasticsearch:8.15.0
Elastic » Elasticsearch » Version: 8.15.1

cpe:2.3:a:elastic:elasticsearch:8.15.1
Elastic » Elasticsearch » Version: 8.15.2

cpe:2.3:a:elastic:elasticsearch:8.15.2
Elastic » Elasticsearch » Version: 8.15.3

cpe:2.3:a:elastic:elasticsearch:8.15.3
Elastic » Elasticsearch » Version: 8.15.4

cpe:2.3:a:elastic:elasticsearch:8.15.4
Elastic » Elasticsearch » Version: 8.15.5

cpe:2.3:a:elastic:elasticsearch:8.15.5
Elastic » Elasticsearch » Version: 8.16.0

cpe:2.3:a:elastic:elasticsearch:8.16.0
Elastic » Elasticsearch » Version: 8.16.1

cpe:2.3:a:elastic:elasticsearch:8.16.1
Elastic » Elasticsearch » Version: 8.16.2

cpe:2.3:a:elastic:elasticsearch:8.16.2
Elastic » Elasticsearch » Version: 8.16.3

cpe:2.3:a:elastic:elasticsearch:8.16.3
Elastic » Elasticsearch » Version: 8.17.0

cpe:2.3:a:elastic:elasticsearch:8.17.0
Elastic » Elasticsearch » Version: 8.17.1

cpe:2.3:a:elastic:elasticsearch:8.17.1
Elastic » Elasticsearch » Version: 8.17.10

cpe:2.3:a:elastic:elasticsearch:8.17.10
Elastic » Elasticsearch » Version: 8.17.2

cpe:2.3:a:elastic:elasticsearch:8.17.2
Elastic » Elasticsearch » Version: 8.17.3

cpe:2.3:a:elastic:elasticsearch:8.17.3
Elastic » Elasticsearch » Version: 8.17.4

cpe:2.3:a:elastic:elasticsearch:8.17.4
Elastic » Elasticsearch » Version: 8.17.5

cpe:2.3:a:elastic:elasticsearch:8.17.5
Elastic » Elasticsearch » Version: 8.17.6

cpe:2.3:a:elastic:elasticsearch:8.17.6
Elastic » Elasticsearch » Version: 8.17.7

cpe:2.3:a:elastic:elasticsearch:8.17.7
Elastic » Elasticsearch » Version: 8.17.8

cpe:2.3:a:elastic:elasticsearch:8.17.8
Elastic » Elasticsearch » Version: 8.17.9

cpe:2.3:a:elastic:elasticsearch:8.17.9
Elastic » Elasticsearch » Version: 8.18.0

cpe:2.3:a:elastic:elasticsearch:8.18.0
Elastic » Elasticsearch » Version: 8.18.1

cpe:2.3:a:elastic:elasticsearch:8.18.1
Elastic » Elasticsearch » Version: 8.18.2

cpe:2.3:a:elastic:elasticsearch:8.18.2
Elastic » Elasticsearch » Version: 8.18.3

cpe:2.3:a:elastic:elasticsearch:8.18.3
Elastic » Elasticsearch » Version: 8.18.4

cpe:2.3:a:elastic:elasticsearch:8.18.4
Elastic » Elasticsearch » Version: 8.18.5

cpe:2.3:a:elastic:elasticsearch:8.18.5
Elastic » Elasticsearch » Version: 8.18.6

cpe:2.3:a:elastic:elasticsearch:8.18.6
Elastic » Elasticsearch » Version: 8.18.7

cpe:2.3:a:elastic:elasticsearch:8.18.7
Elastic » Elasticsearch » Version: 8.18.8

cpe:2.3:a:elastic:elasticsearch:8.18.8
Elastic » Elasticsearch » Version: 8.19.0

cpe:2.3:a:elastic:elasticsearch:8.19.0
Elastic » Elasticsearch » Version: 8.19.1

cpe:2.3:a:elastic:elasticsearch:8.19.1
Elastic » Elasticsearch » Version: 8.19.10

cpe:2.3:a:elastic:elasticsearch:8.19.10
Elastic » Elasticsearch » Version: 8.19.11

cpe:2.3:a:elastic:elasticsearch:8.19.11
Elastic » Elasticsearch » Version: 8.19.12

cpe:2.3:a:elastic:elasticsearch:8.19.12
Elastic » Elasticsearch » Version: 8.19.13

cpe:2.3:a:elastic:elasticsearch:8.19.13
Elastic » Elasticsearch » Version: 8.19.14

cpe:2.3:a:elastic:elasticsearch:8.19.14
Elastic » Elasticsearch » Version: 8.19.15

cpe:2.3:a:elastic:elasticsearch:8.19.15
Elastic » Elasticsearch » Version: 8.19.16

cpe:2.3:a:elastic:elasticsearch:8.19.16
Elastic » Elasticsearch » Version: 8.19.17

cpe:2.3:a:elastic:elasticsearch:8.19.17
Elastic » Elasticsearch » Version: 8.19.18

cpe:2.3:a:elastic:elasticsearch:8.19.18
Elastic » Elasticsearch » Version: 8.19.19

cpe:2.3:a:elastic:elasticsearch:8.19.19
Elastic » Elasticsearch » Version: 8.19.2

cpe:2.3:a:elastic:elasticsearch:8.19.2
Elastic » Elasticsearch » Version: 8.19.3

cpe:2.3:a:elastic:elasticsearch:8.19.3
Elastic » Elasticsearch » Version: 8.19.4

cpe:2.3:a:elastic:elasticsearch:8.19.4
Elastic » Elasticsearch » Version: 8.19.5

cpe:2.3:a:elastic:elasticsearch:8.19.5
Elastic » Elasticsearch » Version: 8.19.6

cpe:2.3:a:elastic:elasticsearch:8.19.6
Elastic » Elasticsearch » Version: 8.19.7

cpe:2.3:a:elastic:elasticsearch:8.19.7
Elastic » Elasticsearch » Version: 8.19.8

cpe:2.3:a:elastic:elasticsearch:8.19.8
Elastic » Elasticsearch » Version: 8.19.9

cpe:2.3:a:elastic:elasticsearch:8.19.9
Elastic » Elasticsearch » Version: 8.2.0

cpe:2.3:a:elastic:elasticsearch:8.2.0
Elastic » Elasticsearch » Version: 8.2.1

cpe:2.3:a:elastic:elasticsearch:8.2.1
Elastic » Elasticsearch » Version: 8.2.2

cpe:2.3:a:elastic:elasticsearch:8.2.2
Elastic » Elasticsearch » Version: 8.2.3

cpe:2.3:a:elastic:elasticsearch:8.2.3
Elastic » Elasticsearch » Version: 8.3.0

cpe:2.3:a:elastic:elasticsearch:8.3.0
Elastic » Elasticsearch » Version: 8.3.1

cpe:2.3:a:elastic:elasticsearch:8.3.1
Elastic » Elasticsearch » Version: 8.3.2

cpe:2.3:a:elastic:elasticsearch:8.3.2
Elastic » Elasticsearch » Version: 8.3.3

cpe:2.3:a:elastic:elasticsearch:8.3.3
Elastic » Elasticsearch » Version: 8.4.0

cpe:2.3:a:elastic:elasticsearch:8.4.0
Elastic » Elasticsearch » Version: 8.4.1

cpe:2.3:a:elastic:elasticsearch:8.4.1
Elastic » Elasticsearch » Version: 8.4.2

cpe:2.3:a:elastic:elasticsearch:8.4.2
Elastic » Elasticsearch » Version: 8.4.3

cpe:2.3:a:elastic:elasticsearch:8.4.3
Elastic » Elasticsearch » Version: 8.5.0

cpe:2.3:a:elastic:elasticsearch:8.5.0
Elastic » Elasticsearch » Version: 8.5.1

cpe:2.3:a:elastic:elasticsearch:8.5.1
Elastic » Elasticsearch » Version: 8.5.2

cpe:2.3:a:elastic:elasticsearch:8.5.2
Elastic » Elasticsearch » Version: 8.5.3

cpe:2.3:a:elastic:elasticsearch:8.5.3
Elastic » Elasticsearch » Version: 8.6.0

cpe:2.3:a:elastic:elasticsearch:8.6.0
Elastic » Elasticsearch » Version: 8.6.1

cpe:2.3:a:elastic:elasticsearch:8.6.1
Elastic » Elasticsearch » Version: 8.6.2

cpe:2.3:a:elastic:elasticsearch:8.6.2
Elastic » Elasticsearch » Version: 8.7.0

cpe:2.3:a:elastic:elasticsearch:8.7.0
Elastic » Elasticsearch » Version: 8.7.1

cpe:2.3:a:elastic:elasticsearch:8.7.1
Elastic » Elasticsearch » Version: 8.8.0

cpe:2.3:a:elastic:elasticsearch:8.8.0
Elastic » Elasticsearch » Version: 8.8.1

cpe:2.3:a:elastic:elasticsearch:8.8.1
Elastic » Elasticsearch » Version: 8.8.2

cpe:2.3:a:elastic:elasticsearch:8.8.2
Elastic » Elasticsearch » Version: 8.9.0

cpe:2.3:a:elastic:elasticsearch:8.9.0
Elastic » Elasticsearch » Version: 8.9.1

cpe:2.3:a:elastic:elasticsearch:8.9.1
Elastic » Elasticsearch » Version: 8.9.2

cpe:2.3:a:elastic:elasticsearch:8.9.2
Elastic » Elasticsearch » Version: 9.0.0

cpe:2.3:a:elastic:elasticsearch:9.0.0
Elastic » Elasticsearch » Version: 9.0.1

cpe:2.3:a:elastic:elasticsearch:9.0.1
Elastic » Elasticsearch » Version: 9.0.2

cpe:2.3:a:elastic:elasticsearch:9.0.2
Elastic » Elasticsearch » Version: 9.0.3

cpe:2.3:a:elastic:elasticsearch:9.0.3
Elastic » Elasticsearch » Version: 9.0.4

cpe:2.3:a:elastic:elasticsearch:9.0.4
Elastic » Elasticsearch » Version: 9.0.5

cpe:2.3:a:elastic:elasticsearch:9.0.5
Elastic » Elasticsearch » Version: 9.0.6

cpe:2.3:a:elastic:elasticsearch:9.0.6
Elastic » Elasticsearch » Version: 9.0.7

cpe:2.3:a:elastic:elasticsearch:9.0.7
Elastic » Elasticsearch » Version: 9.0.8

cpe:2.3:a:elastic:elasticsearch:9.0.8
Elastic » Elasticsearch » Version: 9.1.0

cpe:2.3:a:elastic:elasticsearch:9.1.0
Elastic » Elasticsearch » Version: 9.1.1

cpe:2.3:a:elastic:elasticsearch:9.1.1
Elastic » Elasticsearch » Version: 9.1.10

cpe:2.3:a:elastic:elasticsearch:9.1.10
Elastic » Elasticsearch » Version: 9.1.2

cpe:2.3:a:elastic:elasticsearch:9.1.2
Elastic » Elasticsearch » Version: 9.1.3

cpe:2.3:a:elastic:elasticsearch:9.1.3
Elastic » Elasticsearch » Version: 9.1.4

cpe:2.3:a:elastic:elasticsearch:9.1.4
Elastic » Elasticsearch » Version: 9.1.5

cpe:2.3:a:elastic:elasticsearch:9.1.5
Elastic » Elasticsearch » Version: 9.1.6

cpe:2.3:a:elastic:elasticsearch:9.1.6
Elastic » Elasticsearch » Version: 9.1.7

cpe:2.3:a:elastic:elasticsearch:9.1.7
Elastic » Elasticsearch » Version: 9.1.8

cpe:2.3:a:elastic:elasticsearch:9.1.8
Elastic » Elasticsearch » Version: 9.1.9

cpe:2.3:a:elastic:elasticsearch:9.1.9
Elastic » Elasticsearch » Version: 9.2.0

cpe:2.3:a:elastic:elasticsearch:9.2.0
Elastic » Elasticsearch » Version: 9.2.1

cpe:2.3:a:elastic:elasticsearch:9.2.1
Elastic » Elasticsearch » Version: 9.2.2

cpe:2.3:a:elastic:elasticsearch:9.2.2
Elastic » Elasticsearch » Version: 9.2.3

cpe:2.3:a:elastic:elasticsearch:9.2.3
Elastic » Elasticsearch » Version: 9.2.4

cpe:2.3:a:elastic:elasticsearch:9.2.4
Elastic » Elasticsearch » Version: 9.2.5

cpe:2.3:a:elastic:elasticsearch:9.2.5
Elastic » Elasticsearch » Version: 9.2.6

cpe:2.3:a:elastic:elasticsearch:9.2.6
Elastic » Elasticsearch » Version: 9.2.7

cpe:2.3:a:elastic:elasticsearch:9.2.7
Elastic » Elasticsearch » Version: 9.2.8

cpe:2.3:a:elastic:elasticsearch:9.2.8
Elastic » Elasticsearch » Version: 9.2.9

cpe:2.3:a:elastic:elasticsearch:9.2.9
Elastic » Elasticsearch » Version: 9.3.0

cpe:2.3:a:elastic:elasticsearch:9.3.0
Elastic » Elasticsearch » Version: 9.3.1

cpe:2.3:a:elastic:elasticsearch:9.3.1
Elastic » Elasticsearch » Version: 9.3.2

cpe:2.3:a:elastic:elasticsearch:9.3.2
Elastic » Elasticsearch » Version: 9.3.3

cpe:2.3:a:elastic:elasticsearch:9.3.3
Elastic » Elasticsearch » Version: 9.3.4

cpe:2.3:a:elastic:elasticsearch:9.3.4
Elastic » Elasticsearch » Version: 9.3.5

cpe:2.3:a:elastic:elasticsearch:9.3.5
Elastic » Elasticsearch » Version: 9.3.6

cpe:2.3:a:elastic:elasticsearch:9.3.6
Elastic » Elasticsearch » Version: 9.3.7

cpe:2.3:a:elastic:elasticsearch:9.3.7
Elastic » Elasticsearch » Version: 9.3.8

cpe:2.3:a:elastic:elasticsearch:9.3.8
Elastic » Elasticsearch » Version: 9.4.0

cpe:2.3:a:elastic:elasticsearch:9.4.0
Elastic » Elasticsearch » Version: 9.4.1

cpe:2.3:a:elastic:elasticsearch:9.4.1
Elastic » Elasticsearch » Version: 9.4.2

cpe:2.3:a:elastic:elasticsearch:9.4.2
Elastic » Elasticsearch » Version: 9.4.3

cpe:2.3:a:elastic:elasticsearch:9.4.3
Elastic » Elasticsearch » Version: 9.4.4

cpe:2.3:a:elastic:elasticsearch:9.4.4
Elastic » Elasticsearch » Version: 9.5.0

cpe:2.3:a:elastic:elasticsearch:9.5.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-72687

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