CVE-2026-75036 (GCVE-0-2026-75036)
Vulnerability from cvelistv5 – Published: 2026-09-03 15:15 – Updated: 2026-09-03 15:15
VLAI
EPSS
VEX
Title
Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing
Summary
A security vulnerability was discovered in Fleet's Helm template preprocessing where templates evaluated by the Fleet controller could reach network resources outside the management cluster. A user who can supply bundle content to a repository referenced by a `GitRepo` resource can cause the Fleet controller to:
- Disclose cluster metadata available to the templating context.
- Reveal information about hosts reachable from the controller's network position.
Because the disclosure channel is name resolution, it may remain effective in environments where outbound traffic is otherwise restricted. The disclosed information is limited to values exposed to the Fleet templating context and to name resolution results. Integrity and availability of managed clusters are not affected.
This issue affects Fleet:
from 0.12.0 before 0.12.19,
from 0.13.0 before 0.13.15,
from 0.14.0 before 0.14.10,
from 0.15.0 before 0.15.6, and
from 0.16.0 before 0.16.1.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/rancher/fleet/security/advisor… | vendor-advisory |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Fleet",
"vendor": "SUSE",
"versions": [
{
"lessThan": "0.12.19",
"status": "affected",
"version": "0.12.0",
"versionType": "semver"
},
{
"lessThan": "0.13.15",
"status": "affected",
"version": "0.13.0",
"versionType": "semver"
},
{
"lessThan": "0.14.10",
"status": "affected",
"version": "0.14.0",
"versionType": "semver"
},
{
"lessThan": "0.15.6",
"status": "affected",
"version": "0.15.0",
"versionType": "semver"
},
{
"lessThan": "0.16.1",
"status": "affected",
"version": "0.16.0",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A security vulnerability was discovered in Fleet\u0027s Helm template preprocessing where templates evaluated by the Fleet controller could reach network resources outside the management cluster. A user who can supply bundle content to a repository referenced by a `GitRepo` resource can cause the Fleet controller to:\u003cbr\u003e- Disclose cluster metadata available to the templating context.\u003cbr\u003e- Reveal information about hosts reachable from the controller\u0027s network position.\u003cbr\u003eBecause the disclosure channel is name resolution, it may remain effective in environments where outbound traffic is otherwise restricted. The disclosed information is limited to values exposed to the Fleet templating context and to name resolution results. Integrity and availability of managed clusters are not affected.\u003cbr\u003e\u003cbr\u003eThis issue affects Fleet:\u003cbr\u003efrom 0.12.0 before 0.12.19, \u003cbr\u003efrom 0.13.0 before 0.13.15, \u003cbr\u003efrom 0.14.0 before 0.14.10, \u003cbr\u003efrom 0.15.0 before 0.15.6, and\u003cbr\u003efrom 0.16.0 before 0.16.1."
}
],
"value": "A security vulnerability was discovered in Fleet\u0027s Helm template preprocessing where templates evaluated by the Fleet controller could reach network resources outside the management cluster. A user who can supply bundle content to a repository referenced by a `GitRepo` resource can cause the Fleet controller to:\n- Disclose cluster metadata available to the templating context.\n- Reveal information about hosts reachable from the controller\u0027s network position.\nBecause the disclosure channel is name resolution, it may remain effective in environments where outbound traffic is otherwise restricted. The disclosed information is limited to values exposed to the Fleet templating context and to name resolution results. Integrity and availability of managed clusters are not affected.\n\nThis issue affects Fleet:\nfrom 0.12.0 before 0.12.19, \nfrom 0.13.0 before 0.13.15, \nfrom 0.14.0 before 0.14.10, \nfrom 0.15.0 before 0.15.6, and\nfrom 0.16.0 before 0.16.1."
}
],
"impacts": [
{
"capecId": "CAPEC-664",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-664 Server Side Request Forgery"
}
]
},
{
"capecId": "CAPEC-116",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-116 Excavation"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "CWE-918 Server-Side request forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1336",
"description": "CWE-1336 Improper neutralization of special elements used in a template engine",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T15:15:25.490Z",
"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
"shortName": "suse"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://github.com/rancher/fleet/security/advisories/GHSA-x9m6-xcjr-hpjp"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
"assignerShortName": "suse",
"cveId": "CVE-2026-75036",
"datePublished": "2026-09-03T15:15:25.490Z",
"dateReserved": "2026-08-17T15:22:54.444Z",
"dateUpdated": "2026-09-03T15:15:25.490Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-75036\",\"sourceIdentifier\":\"meissner@suse.de\",\"published\":\"2026-09-03T16:18:22.607\",\"lastModified\":\"2026-09-03T16:25:43.557\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A security vulnerability was discovered in Fleet\u0027s Helm template preprocessing where templates evaluated by the Fleet controller could reach network resources outside the management cluster. A user who can supply bundle content to a repository referenced by a `GitRepo` resource can cause the Fleet controller to:\\n- Disclose cluster metadata available to the templating context.\\n- Reveal information about hosts reachable from the controller\u0027s network position.\\nBecause the disclosure channel is name resolution, it may remain effective in environments where outbound traffic is otherwise restricted. The disclosed information is limited to values exposed to the Fleet templating context and to name resolution results. Integrity and availability of managed clusters are not affected.\\n\\nThis issue affects Fleet:\\nfrom 0.12.0 before 0.12.19, \\nfrom 0.13.0 before 0.13.15, \\nfrom 0.14.0 before 0.14.10, \\nfrom 0.15.0 before 0.15.6, and\\nfrom 0.16.0 before 0.16.1.\"}],\"affected\":[{\"source\":\"meissner@suse.de\",\"affectedData\":[{\"vendor\":\"SUSE\",\"product\":\"Fleet\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0.12.0\",\"lessThan\":\"0.12.19\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.13.0\",\"lessThan\":\"0.13.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.14.0\",\"lessThan\":\"0.14.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.15.0\",\"lessThan\":\"0.15.6\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.16.0\",\"lessThan\":\"0.16.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"meissner@suse.de\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"meissner@suse.de\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"},{\"lang\":\"en\",\"value\":\"CWE-1336\"}]}],\"references\":[{\"url\":\"https://github.com/rancher/fleet/security/advisories/GHSA-x9m6-xcjr-hpjp\",\"source\":\"meissner@suse.de\"}]}}"
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…