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Advisories / SA-2026-015
SA-2026-015: Unquoted and unchecked links on the fact-check and signals pages
| Severity | medium |
| Status | fixed |
| Weakness | CWE-79 |
| Component | admin/build/build.py (fact-check, signals, stat) |
| Found by | security@php.newsroom (pass 2 review) |
| Found | 2026-10-24 |
| Fixed in | v0.11.1 |
| Fixed by | security@php.newsroom |
What it is
Two links wrote href=... without quotes, from claim ids and story slugs; a ticket URL used E() instead of U(); stat() wrote its href raw.
What an attacker could do
A claim id with a space could add an event handler.
How: A contradictions row with id "x onfocus=... autofocus".
Root cause
Quoting an attribute was left to each author.
What contributed
- The markdown converter also missed the unquoted links, so the twins lost them.
What was not in place
A check that catches the class, not the instance.
The fix
All quoted and passed through E() or U().
What prevents it now
The gate check for inline event handlers (security branch); the CSP.