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CVE-2026-88804— Unauthenticated update of public UI settings leading to stored cross-site scripting in Rancher

Quick assessment

Affected
SUSE Rancher
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.

在 SUSE Rancher 2.15 的 2.15.2 之前版本、2.14 的 2.14.6 之前版本、2.13 的 2.13.10 之前版本、2.12 的 2.12.14 之前版本以及 2.11 的 2.11.18 之前版本中，未经身份验证的公共 UI 设置更新功能可能被远程攻击者利用，在 Rancher UI 中执行存储型跨站脚本攻击（Stored Cross-Site Scripting, XSS）。

CVSS 9.6 · Critical
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I. Basic Information for CVE-2026-88804

Vulnerability Information
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Vulnerability Title
Unauthenticated update of public UI settings leading to stored cross-site scripting in Rancher
Source: CVE Program / CVE List V5
Vulnerability Description
An unauthenticated update of public UI settings could be used by remote attackers to execute a stored cross-site scripting attack in the Rancher UI, in SUSE Rancher 2.15 before 2.15.2, 2.14 before 2.14.6, 2.13 before 2.13.10, 2.12 before 2.12.14 and 2.11 before 2.11.18.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 2.15.0 ~ 2.15.2 -

II. Public POCs for CVE-2026-88804

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III. Intelligence Information for CVE-2026-88804

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Other References for CVE-2026-88804 (1)

Same Patch Batch · SUSE · 2026-09-28 · 8 CVEs total

CVE-2026-88808 8.8 HIGH Fleet agent copies downstream resources with cluster-admin privileges, allowing cross-name
CVE-2026-78424 8.8 HIGH OS Command Injection in Packet-Capture (Sniffer) Filter leading to Remote Code Execution o
CVE-2026-88805 8.1 HIGH Session Not Revoked Server-Side on Logout in Rancher
CVE-2026-93538 7.1 HIGH Cross-tenant BundleDeployment and Secret disclosure via spoofed cluster labels during agen
CVE-2026-93540 6.5 MEDIUM Fleet applies namespace labels and annotations without the bundle's service account privil
CVE-2026-93537 6.5 MEDIUM Path traversal in Fleet Helm valuesFiles allows disclosure of files outside the bundle dir
CVE-2026-93539 5.4 MEDIUM Unauthenticated GitRepo Spec Mutation via Fleet Git Webhook Receiver

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-79

V. Comments for CVE-2026-88804

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