CVE-2026-42875
published 2026-05-11CVE-2026-42875: External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced…
PriorityP430medium5.3CVSS 4.0
AVNACLATNPRLUINVCNVINVANSCLSILSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.37%
29.6th percentile
External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced SecretStore resources that used CAProvider with type ConfigMap could resolve CA material from another namespace when caProvider.namespace was set. This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver. This vulnerability is fixed in 2.4.0.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| external-secrets | external-secrets | < 2.4.0 | 2.4.0 |
| github.com | external-secrets_external-secrets | >= 0 < 2.4.0 | 2.4.0 |
CVSS provenance
nvdv4.05.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/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
vendor_redhat5.3MEDIUM
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GHSA
External Secrets Operator has Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
ghsa·2026-05-05
CVE-2026-42875 [LOW] CWE-285 External Secrets Operator has Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
External Secrets Operator has Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
### Impact
Namespaced SecretStore resources that used CAProvider with type `ConfigMap` could resolve CA material from another namespace when `caProvider.namespace` was set.
This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver.
The accessible data is used as CA validation material, hence it is not directly exposed.
Impact:
- Direct data exfiltration risk: low
- Existence disclosure: an attacker can infer whether a target ConfigMap/key exists in another namespace.
- Trust-boundary violation: a tenant can make its SecretStore consume CA material owned by another namespace.
Red Hat
external-secrets: External Secrets Operator: Namespace boundary bypass allows unauthorized access to CA material
vendor_redhat·2026-05-11·CVSS 5.3
CVE-2026-42875 [MEDIUM] CWE-653 external-secrets: External Secrets Operator: Namespace boundary bypass allows unauthorized access to CA material
external-secrets: External Secrets Operator: Namespace boundary bypass allows unauthorized access to CA material
External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced SecretStore resources that used CAProvider with type ConfigMap could resolve CA material from another namespace when caProvider.namespace was set. This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver. This vulnerability is fixed in 2.4.0.
A flaw was found in External Secrets Operator. Namespaced SecretStore resources configured with CAProvider of type ConfigMap, when caProvider.namespace is set, could resolve Certificate Authority (CA) mat
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-42875 external-secrets: External Secrets Operator: Namespace boundary bypass allows unauthorized access to CA material
bugzilla·2026-05-11·CVSS 5.3
CVE-2026-42875 [MEDIUM] CVE-2026-42875 external-secrets: External Secrets Operator: Namespace boundary bypass allows unauthorized access to CA material
CVE-2026-42875 external-secrets: External Secrets Operator: Namespace boundary bypass allows unauthorized access to CA material
External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced SecretStore resources that used CAProvider with type ConfigMap could resolve CA material from another namespace when caProvider.namespace was set. This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver. This vulnerability is fixed in 2.4.0.
Bugzilla
CVE-2023-42875 webkit2gtk4.0: Processing web content may lead to arbitrary code execution [fedora-all]
bugzilla·2025-05-15·CVSS 7.3
CVE-2023-42875 [HIGH] CVE-2023-42875 webkit2gtk4.0: Processing web content may lead to arbitrary code execution [fedora-all]
CVE-2023-42875 webkit2gtk4.0: Processing web content may lead to arbitrary code execution [fedora-all]
More information about this security flaw is available in the following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2366497
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'vers
2026-05-11
Published