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Advisories / SA-2026-029
SA-2026-029: Browser signing keys can be used by any script on the origin
| Severity | medium |
| Status | mitigated |
| Weakness | CWE-269 |
| Component | assets/feedback/identity.js |
| Found by | security@php.newsroom (pass 2 review) |
| Found | 2026-10-24 |
| Fixed in | not yet |
What it is
Contributors' signing keys are non-extractable, but a script running on the origin can still sign with them, including invitations from the editor's device.
What an attacker could do
Feedback signed as the editor; new team identities.
How: Needs script on the origin, which the CSP now blocks.
Root cause
Same as SA-2026-026.
What was not in place
An origin of its own.
What would fix it
Move identity to its own origin; the drain refuses invitations above a role allow-list.