CVE-2026-72676

Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-93/389510	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana:9.5.0:::::::*

History

No history.

Information

Published : 2026-08-13 20:17

Updated : 2026-09-04 20:21

NVD link : CVE-2026-72676

Mitre link : CVE-2026-72676

CVE.ORG link : CVE-2026-72676

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

{"id": "CVE-2026-72676", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72676", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-13T20:20:49.592834Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@elastic.co", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@elastic.co", "affectedData": [{"vendor": "Elastic", "product": "Fleet Server", "versions": [{"status": "affected", "version": "8.5.0", "versionType": "semver", "lessThanOrEqual": "8.19.19"}, {"status": "affected", "version": "9.0.0", "versionType": "semver", "lessThanOrEqual": "9.4.4"}, {"status": "affected", "version": "9.5.0", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-13T20:17:28.257", "references": [{"url": "https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-93/389510", "tags": ["Vendor Advisory"], "source": "security@elastic.co"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@elastic.co", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data."}], "lastModified": "2026-09-04T20:21:02.873", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A010CABD-76B1-48AB-B16A-91C789D854F5", "versionEndExcluding": "8.19.20", "versionStartIncluding": "8.5.0"}, {"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9F37AF25-8E17-4F1A-A91E-14B4867912AE", "versionEndExcluding": "9.4.5", "versionStartIncluding": "9.0.0"}, {"criteria": "cpe:2.3:a:elastic:kibana:9.5.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "84458CAB-8701-410B-A34C-7F6FC698CE9E"}], "operator": "OR"}]}], "sourceIdentifier": "security@elastic.co"}