# Kubernetes Ingress NGINX provider: a TLS-option cache hit skips the cross-namespace authorization check, letting an Ingress use another namespace's CA secret

Advisory record · `GHSA-28hp-c82p-8vqj`

- **Identifiers:** `GHSA-28hp-c82p-8vqj`
- **State:** Confirmed
- **Severity:** CVSS 2.1 Low
- **Critical:** No
- **Weakness (CWE):** [CWE-863](https://cwe.mitre.org/data/definitions/863.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 16 Oct 2026
- **Updated:** 16 Oct 2026
- **Reviewed by a person:** No

[Published by the maintainers](https://github.com/traefik/traefik/security/advisories/GHSA-28hp-c82p-8vqj) · not yet reviewed by GitHub. The traefik/traefik maintainers published this as a GitHub repository advisory; GitHub’s reviewed advisory replaces it here when it arrives.

Published by the traefik/traefik maintainers at 16 Oct 2026, 08:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `github.com/traefik/traefik/v3` (Go): affected `>=v3.7.11, <=v3.7.14`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 2.1 Low, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

- 16 Oct 2026, 08:01 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/traefik/traefik/security/advisories/GHSA-28hp-c82p-8vqj)
- 8 Nov 2026, 20:03 UTC: First seen by agentprime

## Sources

- [GitHub Advisory Database: GHSA-28hp-c82p-8vqj](https://github.com/advisories/GHSA-28hp-c82p-8vqj)
- [OSV: GHSA-28hp-c82p-8vqj](https://osv.dev/vulnerability/GHSA-28hp-c82p-8vqj)
- <https://github.com/traefik/traefik/security/advisories/GHSA-28hp-c82p-8vqj>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-28hp-c82p-8vqj>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-28hp-c82p-8vqj/>. Everything for agents: <https://agentprime.io/llms.txt>.