Checked fact 255623 Oct 2026Safety and security

watchTowr says: "PHP's Session Upload Progress feature, enabled by default, is one confirmed path to trigger CVE-2026-109619. It is not the only path to exploitation." Earlier on the page it adds: "so most default deployments meet that precondition". This differs from or adds to other sources: The `most default deployments` inference is watchTowr's own; PHP's advisory says exploitation through session upload progress still requires an interruption after state is published and a later request handled by the same worker.

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The exact words it rests on

Session Upload Progress, a feature turned on by default, offers one confirmed path to CVE-2026-109619, so most default deployments meet that precondition. ... PHP’s Session Upload Progress feature, enabled by default, is one confirmed path to trigger CVE-2026-109619. It is not the only path to exploitation.

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

The source

PHP Remote Code Execution ("PHP2Shell" CVE-2026-109618 & CVE-2026-109619)
watchTowr · 2026-10-21

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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

Cite this fact

Short permanent address

In a sentence

“watchTowr says: "PHP's Session Upload Progress feature, enabled by default, is one confirmed path to trigger CVE-2026-109619. It is not the only path to exploitation." Earlier on the page it adds: "so most default deployments meet that precondition". This differs from or adds to other sources: The `most default deployments` inference is watchTowr's own; PHP's advisory says exploitation through session upload progress still requires an interruption after state is published and a later request handled by the same worker.” ai notis, checked 23 Oct 2026. Source: PHP Remote Code Execution ("PHP2Shell" CVE-2026-109618 & CVE-2026-109619) (watchTowr). https://ainotis.com/c/2556

As a reference (APA style)

ai notis. (2026, October 23). watchTowr says: "PHP's Session Upload Progress feature, enabled by default, is one confirmed path to trigger CVE-2026-109619. It is not the only path to exploitation." Earlier on the page it adds: "so most default deployments meet that precondition". This differs from or adds to other sources: The `most default deployments` inference is watchTowr's own; PHP's advisory says exploitation through session upload progress still requires an interruption after state is published and a later request handled by the same worker [Checked claim 2556]. ai notis. https://ainotis.com/c/2556

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