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CVE-2026-78607

Missing Authorization in Elasticsearch Leading to Information Disclosure

5.4 MediumFix available

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.33%Up 0.2 points since Sep 2, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.4

Missing Authorization in Elasticsearch Leading to Information Disclosure

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
CVE-2026-78607
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
EUVDEUVD-2026-69570 5.4

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
EUVD-2026-69570
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-876r-2mv4-qm43 5.4

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to...

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
GHSA-876r-2mv4-qm43
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
NVD 5.4

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
CVE-2026-78607
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
OSV 5.4

Missing Authorization in Elasticsearch Leading to Information Disclosure

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
CVE-2026-78607
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
OSVAZL-98445 No score

CVE-2026-78607 affecting package rubygem-elasticsearch 8.9.0-1

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
AZL-98445
Updated
2026-11-02
OSVBIT-elasticsearch-2026-78607 No score

Missing Authorization in Elasticsearch Leading to Information Disclosure

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Record
BIT-elasticsearch-2026-78607
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rubygem-elasticsearch
Azure Linux:3
through 8.9.0-1 None known
elasticsearch
Bitnami
8.0.0 up to 8.19.19, 9.0.0 up to 9.3.8, 9.4.0 up to 9.4.4, 9.5.0 up to 9.5.1
8.19.199.3.89.4.49.5.1

History

History
RecordedChangedSources
affected, aliases, published, referencesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-78607 is a medium vulnerability (CVSS 5.4) in Elastic Elasticsearch, published September 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 25th percentile. Fixed in elasticsearch 8.19.19.

References

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