Update, 10/21/2026, 9:55 a.m.: The patches have been released, with fixes shipped as versions 8.5.12, 8.4.27, 8.3.36 and 8.2.35, covering the supported branches, 8.2 through 8.5. Our original story is below. The PHP project is preparing an unscheduled security release for Wednesday to fix two vulnerabilities it rates as critical after details of the flaws leaked online and a major internet infrastructure company reported early attacks.

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