# CVE-2026-14476: Sssd: sssd: gpo cache path traversal via unsanitized gpcfilesyspath allows kerberos authentication bypass

> An attacker with AD GPO management access can exploit a path traversal flaw in SSSD to write files as root, potentially bypassing Kerberos authentication.

- **Severity:** High 8.0 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Jul 2026
- **Updated:** 8 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-14476, GHSA-v6qh-pm8g-3c5w, OESA-2026-3147, OESA-2026-3148, UBUNTU-CVE-2026-14476

## What is CVE-2026-14476?

CVE-2026-14476 is a high-severity path traversal vulnerability in Red Hat Enterprise Linux 10, published on 7 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.

Weakness: CWE-23 (Relative Path Traversal)

## Which versions are affected by CVE-2026-14476?


## How do I fix CVE-2026-14476?

Apply the vendor's patch.

## Is CVE-2026-14476 being exploited?

There is no known exploitation of CVE-2026-14476 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-14476 and fix it if it is affected.

What it is: CVE-2026-14476 is a high-severity path traversal vulnerability in Red Hat Enterprise Linux 10, published on 7 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-14476 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 10. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-14476/ (Markdown: https://insights.sbomify.com/CVE-2026-14476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-14476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-14476
- OSV: https://osv.dev/vulnerability/CVE-2026-14476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-14476/
Summaries are generated and may contain mistakes; the official description above is the record.