CVE-2026-88804Network attack vectorHinoki check available

Stored XSS via unauthenticated settings writes

Published Sep 28, 2026 · Updated Sep 28, 2026

Stored XSS in SUSE Rancher allows remote attackers to run script in users' browsers via unauthenticated public UI settings routes. Norman API request parsing lets method-override parameters turn intended read-only settings requests into writes, and a modified setting is rendered as raw HTML on the login page. A user must later open that page; the script can expose an administrator bootstrap password or hijack an active administrator session.

CVSS severity9.4
Critical
EPSS probability0.60%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in SUSE Rancher allows remote attackers to run script in users' browsers via unauthenticated public UI settings routes. Norman API request parsing lets method-override parameters turn intended read-only settings requests into writes, and a modified setting is rendered as raw HTML on the login page. A user must later open that page; the script can expose an administrator bootstrap password or hijack an active administrator session.

The record

CVE
CVE-2026-88804
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
SUSE
Product
Rancher
Classifications
CWE-862, CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.11.0se <2.11.18
  2. Affected versionversion=2.12.0 <2.12.14
  3. Affected versionversion=2.13.0 <2.13.10
  4. Affected versionversion=2.14.0 <2.14.6
  5. Affected versionversion=2.15.0 <2.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SUSE · Rancherversion=2.11.0se <2.11.18; version=2.12.0 <2.12.14; version=2.13.0 <2.13.10; version=2.14.0 <2.14.6; version=2.15.0 <2.15.2

Published CVSS scores

9.4SUSE RancherCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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