Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-42876— External Secrets Operator: Priviledge escalation with secret overwriting

Quick assessment

Affected
external-secrets external-secrets
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

External Secrets是External Secrets开源的一个 Kubernetes 相关应用程序。 External Secrets Operator 2.4.1之前版本存在授权问题漏洞，该漏洞源于用户可创建ExternalSecret资源，导致操作员创建包含长期令牌的Secret，从而模拟任何服务账户。

CVSS 4.9 · Medium EPSS 0.21% · P12

Affected Version Matrix 1

VendorProduct Version RangeStatus
external-secrets external-secrets < 2.4.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-42876

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
External Secrets Operator: Priviledge escalation with secret overwriting
Source: CVE Program / CVE List V5
Vulnerability Description
External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.1, a user who only has permission to create ExternalSecret resources can cause the operator to create a Secret that Kubernetes will automatically populate with a long-lived token for the specified service account. This effectively allows the user to impersonate any service account in the namespace without needing direct create permissions on TokenRequest or Secrets of that type. This vulnerability is fixed in 2.4.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
External Secrets 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
External Secrets是External Secrets开源的一个 Kubernetes 相关应用程序。 External Secrets Operator 2.4.1之前版本存在授权问题漏洞，该漏洞源于用户可创建ExternalSecret资源，导致操作员创建包含长期令牌的Secret，从而模拟任何服务账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
external-secrets external-secrets < 2.4.1 -

II. Public POCs for CVE-2026-42876

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-42876

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-42876 (1)

Vendor Advisories for CVE-2026-42876 (1)

Vendor Pages for CVE-2026-42876 (1)

IV. Related Vulnerabilities

Same product: external-secrets
Same vendor: external-secrets
Same weakness: CWE-285

V. Comments for CVE-2026-42876

No comments yet

Leave a comment