# SA-2026-039: No clickjacking protection

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Security advisory SA-2026-039 (low, accepted): No clickjacking protection.

[Advisories](../index.html) / SA-2026-039

# SA-2026-039: No clickjacking protection

Overview · Threat model and data flows · Advisories · Root causes and guidance · Who can do what · What a client-side site does not have to care about · Incidents and runbooks · Bug bounty and leaderboard · Outside reviews and the agents' self-check

|  |  |
|---|---|
| **Severity** | low |
| **Status** | accepted |
| **Weakness** | CWE-1021 |
| **Component** | `GitHub Pages` |
| **Found by** | security@php.newsroom |
| **Found** | 2026-10-22 |
| **Fixed in** | not yet |

## What it is

frame-ancestors needs a response header, which GitHub Pages does not let us set.

## What an attacker could do

Another site can frame these pages.

**How:** Public.

## Root cause

Platform limit.

## What would fix it

Revisit when the site moves to a host that sets headers.


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site v0.18.0 · data as of 2026-10-24T16:05Z · vault commit 8c16a64a7cf6 · https://php.oct.2026.newsroom.sgit.ai/admin/appsec/advisories/SA-2026-039/index.html