The advisory says of session upload progress: "Session upload progress is enabled by default, and no application call to `session_start()` is required. It can supply a producer, consumer or both, but exploitation still requires an interruption after state is published and a subsequent request handled by the same worker."

The exact words it rests on

Session upload progress is enabled by default, and no application call to `session_start()` is required. It can supply a producer, consumer or both, but exploitation still requires an interruption after state is published and a subsequent request handled by the same worker.

What the source said when we opened it, on 23 Oct 2026.

The source

GHSA-6wmf-4rv5-p3rp: RCE via stale global state (CVE-2026-109619)
PHP project (php-src security advisories) · 2026-10-21

Open the sourcearchived copy

Checked

Checked by the notis newsroom on 23 Oct 2026, against the source above.

In the story

PHP patches two critical remote code execution flaws 23 Oct 2026