SUSE Rancher: cross-site scripting

SUSE Rancher

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.

Fix it

Rancher

On 2.11.xUpgrade to Rancher 2.11.18
On 2.12.xUpgrade to Rancher 2.12.14
On 2.13.xUpgrade to Rancher 2.13.10
On 2.14.xUpgrade to Rancher 2.14.6
On 2.15.xUpgrade to Rancher 2.15.2

github.com/rancher/rancher go

On 2.11.x?go get github.com/rancher/rancher@v2.11.18
On 2.12.x?go get github.com/rancher/rancher@v2.12.14
On 2.13.x?go get github.com/rancher/rancher@v2.13.10
On 2.14.x?go get github.com/rancher/rancher@v2.14.6
On 2.15.x?go get github.com/rancher/rancher@v2.15.2

First seen: 29 Oct 2026
Last update: 29 Oct 2026, 14:17 UTC
Fixed in: github.com/rancher/rancher 2.15.2
github.com/rancher/rancher 2.14.6
github.com/rancher/rancher 2.13.10
github.com/rancher/rancher 2.12.14
github.com/rancher/rancher 2.11.18
Identifiers: CVE-2026-88804
CVSS: 9.6
Source: news
On the menu as: Go

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## SUSE Rancher: cross-site scripting
Severity: critical. Patch status: patched.
Affected: SUSE Rancher
Fixed in: github.com/rancher/rancher 2.15.2, github.com/rancher/rancher 2.14.6, github.com/rancher/rancher 2.13.10, github.com/rancher/rancher 2.12.14, github.com/rancher/rancher 2.11.18
Ids: CVE-2026-88804

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.

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `github.com/rancher/rancher`. For each hit, compare the installed version with the fix on the same major line: github.com/rancher/rancher 2.15.2, github.com/rancher/rancher 2.14.6, github.com/rancher/rancher 2.13.10, github.com/rancher/rancher 2.12.14, github.com/rancher/rancher 2.11.18. If it's lower, give the exact upgrade command for the package manager this repo uses.
2. Fix by release line: github.com/rancher/rancher: >=v2.15.0 <v2.15.2 → 2.15.2; >=v2.14.0 <v2.14.6 → 2.14.6; >=v2.13.0 <v2.13.10 → 2.13.10; >=v2.12.0 <v2.12.14 → 2.12.14; >=v2.11.0 <v2.11.18 → 2.11.18. Rancher: 2.15.x → 2.15.2; 2.14.x → 2.14.6; 2.13.x → 2.13.10; 2.12.x → 2.12.14; 2.11.x → 2.11.18.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| github.com/rancher/rancher >=v2.15.0 <v2.15.2 | fixed | 2.15.2 | — |
| github.com/rancher/rancher >=v2.14.0 <v2.14.6 | fixed | 2.14.6 | — |
| github.com/rancher/rancher >=v2.13.0 <v2.13.10 | fixed | 2.13.10 | — |
| github.com/rancher/rancher >=v2.12.0 <v2.12.14 | fixed | 2.12.14 | — |
| github.com/rancher/rancher >=v2.11.0 <v2.11.18 | fixed | 2.11.18 | — |
| Rancher 2.15.x | fixed | 2.15.2 | — |
| Rancher 2.14.x | fixed | 2.14.6 | — |
| Rancher 2.13.x | fixed | 2.13.10 | — |
| Rancher 2.12.x | fixed | 2.12.14 | — |
| Rancher 2.11.x | fixed | 2.11.18 | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-88804") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/rancher/rancher/security/advisories/GHSA-992f-xh8r-jg2f https://nvd.nist.gov/vuln/detail/CVE-2026-88804
https://pwned.coffee/i/an-unauthenticated-update-of-public-ui-settings-could-be-cve-2026-88804

Timeline

29 Oct 2026, 14:18 UTC
Fix status: unknown → patched.
29 Oct 2026
First reported.

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
github.com/rancher/rancher (go) >=v2.15.0, <v2.15.2 2.15.2 GitHub advisory checked 29 Oct
github.com/rancher/rancher (go) >=v2.14.0, <v2.14.6 2.14.6 GitHub advisory checked 29 Oct
github.com/rancher/rancher (go) >=v2.13.0, <v2.13.10 2.13.10 GitHub advisory checked 29 Oct
github.com/rancher/rancher (go) >=v2.12.0, <v2.12.14 2.12.14 GitHub advisory checked 29 Oct
github.com/rancher/rancher (go) >=v2.11.0, <v2.11.18 2.11.18 GitHub advisory checked 29 Oct
Rancher 2.15.0 to before 2.15.2 2.15.2 CVE record (CNA) checked 29 Oct
Rancher 2.14.0 to before 2.14.6 2.14.6 CVE record (CNA) checked 29 Oct
Rancher 2.13.0 to before 2.13.10 2.13.10 CVE record (CNA) checked 29 Oct
Rancher 2.12.0 to before 2.12.14 2.12.14 CVE record (CNA) checked 29 Oct
Rancher 2.11.0se to before 2.11.18 2.11.18 CVE record (CNA) checked 29 Oct
Score: CVSS 9.6 (critical). CVSS 3.1 9.6 (CNA suse) for CVE-2026-88804
Last checked: 29 Oct 2026, 14:18 UTC

Product	Affected	Fixed in	Source
github.com/rancher/rancher (go)	>=v2.15.0, <v2.15.2	2.15.2	GitHub advisory checked 29 Oct
github.com/rancher/rancher (go)	>=v2.14.0, <v2.14.6	2.14.6	GitHub advisory checked 29 Oct
github.com/rancher/rancher (go)	>=v2.13.0, <v2.13.10	2.13.10	GitHub advisory checked 29 Oct
github.com/rancher/rancher (go)	>=v2.12.0, <v2.12.14	2.12.14	GitHub advisory checked 29 Oct
github.com/rancher/rancher (go)	>=v2.11.0, <v2.11.18	2.11.18	GitHub advisory checked 29 Oct
Rancher	2.15.0 to before 2.15.2	2.15.2	CVE record (CNA) checked 29 Oct
Rancher	2.14.0 to before 2.14.6	2.14.6	CVE record (CNA) checked 29 Oct
Rancher	2.13.0 to before 2.13.10	2.13.10	CVE record (CNA) checked 29 Oct
Rancher	2.12.0 to before 2.12.14	2.12.14	CVE record (CNA) checked 29 Oct
Rancher	2.11.0se to before 2.11.18	2.11.18	CVE record (CNA) checked 29 Oct

Sources: KEV – CVE record ✓ Vendor ✓

Sources

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

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