CVE-2026-34984

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-34984
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34984.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34984
Aliases
Downstream
Related
Published
2026-04-14T01:48:41.166Z
Modified
2026-07-08T08:12:57.387924279Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
External Secrets Operator has DNS exfiltration via getHostByName in its v2 template engine
Details

External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Versions 2.2.0 and below contain a vulnerability in runtime/template/v2/template.go where the v2 template engine removes env and expandenv from Sprig's TxtFuncMap() but leaves the getHostByName function accessible to user-controlled templates. Since ESO executes templates within the controller process, an attacker who can create or update templated ExternalSecret resources can invoke controller-side DNS lookups using secret-derived values. This creates a DNS exfiltration primitive, allowing fetched secret material to be leaked via DNS queries without requiring direct outbound network access from the attacker's workload. The impact is a confidentiality issue, particularly in environments where untrusted or lower-trust users can author templated ExternalSecret resources and the controller has DNS resolution capability. This issue has been fixed in version 2.3.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34984.json",
    "cwe_ids": [
        "CWE-200"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/external-secrets/external-secrets

Affected ranges

Type
GIT
Repo
https://github.com/external-secrets/external-secrets
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1f9683fa65eb92e27f8a0adab2e483ff305fc1e9
Fixed
6800989bdc12782ca2605d3b8bf7f2876a16551a
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:external-secrets:external_secrets_operator:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.3.0"
        }
    ]
}

Affected versions

helm-chart-0.*
helm-chart-0.1.1
helm-chart-0.1.2
helm-chart-0.1.3
helm-chart-0.1.4
helm-chart-0.10.0
helm-chart-0.10.1
helm-chart-0.10.2
helm-chart-0.10.6
helm-chart-0.14.1
helm-chart-0.14.2
helm-chart-0.15.1
helm-chart-0.16.0
helm-chart-0.17.0
helm-chart-0.18.0-rc1
helm-chart-0.19.2
helm-chart-0.2.0
helm-chart-0.2.1
helm-chart-0.2.2
helm-chart-0.2.3
helm-chart-0.20.1
helm-chart-0.20.2
helm-chart-0.20.3
helm-chart-0.20.4
helm-chart-0.3.0
helm-chart-0.3.1
helm-chart-0.3.10
helm-chart-0.3.11
helm-chart-0.3.2
helm-chart-0.3.3
helm-chart-0.3.4
helm-chart-0.3.5
helm-chart-0.3.6
helm-chart-0.3.7
helm-chart-0.3.8
helm-chart-0.3.9
helm-chart-0.4.0
helm-chart-0.4.1
helm-chart-0.4.2
helm-chart-0.4.3
helm-chart-0.4.4
helm-chart-0.5.0
helm-chart-0.5.1
helm-chart-0.5.2
helm-chart-0.5.3
helm-chart-0.5.4
helm-chart-0.5.5
helm-chart-0.5.6
helm-chart-0.5.7
helm-chart-0.5.8
helm-chart-0.5.9
helm-chart-0.6.0
helm-chart-0.6.0-rc1
helm-chart-0.6.1
helm-chart-0.7.0
helm-chart-0.7.0-rc1
helm-chart-0.7.1
helm-chart-0.7.2
helm-chart-0.8.0
helm-chart-0.8.1
helm-chart-0.8.2
helm-chart-0.8.3
helm-chart-0.9.0
helm-chart-0.9.1
helm-chart-0.9.10
helm-chart-0.9.11
helm-chart-0.9.12
helm-chart-0.9.13
helm-chart-0.9.14
helm-chart-0.9.15-2
helm-chart-0.9.16
helm-chart-0.9.17
helm-chart-0.9.18
helm-chart-0.9.19
helm-chart-0.9.2
helm-chart-0.9.20
helm-chart-0.9.3
helm-chart-0.9.4
helm-chart-0.9.5
helm-chart-0.9.6
helm-chart-0.9.7
helm-chart-0.9.8
helm-chart-0.9.9
helm-chart-1.*
helm-chart-1.0.0
helm-chart-1.1.0
helm-chart-1.1.1
helm-chart-1.2.0
helm-chart-1.2.1
helm-chart-1.3.1
helm-chart-1.3.2
helm-chart-2.*
helm-chart-2.0.0
helm-chart-2.0.1
helm-chart-2.1.0
helm-chart-2.2.0
v.*
v.0.3.6
v0.*
v0.1.0
v0.1.0-esoctl
v0.1.0-render
v0.1.2
v0.1.3
v0.1.4
v0.10.0
v0.10.1
v0.10.2
v0.10.3
v0.10.4
v0.10.5
v0.10.6
v0.10.7
v0.11.0
v0.12.0
v0.12.1
v0.13.0
v0.14.0
v0.14.1
v0.14.2
v0.14.3
v0.14.4
v0.15.0
v0.15.1
v0.16.0
v0.16.1
v0.16.2
v0.17.0
v0.17.1-rc1
v0.18.0
v0.18.0-rc1
v0.18.1
v0.18.2
v0.19.0
v0.19.1
v0.19.2
v0.2.0
v0.2.0-esoctl
v0.2.1
v0.2.1-esoctl
v0.2.2
v0.2.3
v0.20.0
v0.20.1
v0.20.2
v0.20.3
v0.20.4
v0.3.0
v0.3.1
v0.3.10
v0.3.11
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.3.9
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v0.6.0
v0.6.0-rc1
v0.6.1
v0.7.0
v0.7.0-rc1
v0.7.1
v0.7.2
v0.7.3
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.9.0
v0.9.1
v0.9.10
v0.9.11
v0.9.12
v0.9.13
v0.9.14
v0.9.15
v0.9.15-2
v0.9.16
v0.9.17
v0.9.18
v0.9.19
v0.9.2
v0.9.20
v0.9.3
v0.9.4
v0.9.5
v0.9.6
v0.9.7
v0.9.8
v0.9.9
v1.*
v1.0.0
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.3.2
v2.*
v2.0.0
v2.0.1
v2.1.0
v2.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34984.json"