Critical PHP Vulnerability: PM Urges Patch

Japanese PM urges PHP patch amid critical security flaws.

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Oct 21, 2026

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Critical PHP Vulnerability: PM Urges Patch

Japanese PM urges PHP patch amid critical security flaws.

In brief

Japanese PM urges PHP patch amid critical security flaws. Japanese Prime Minister Sanae Takaichi called for urgent PHP patch application after two critical vulnerabilities were found, with site shutdown as a temporary measure. Originally reported by BigGo Finance.

Critical PHP Vulnerability

Critical PHP Vulnerability: PM Takaichi Urges Prompt Patch Application, Site Shutdown Also an Option

Two critical vulnerabilities (CVE-2026-109618 and CVE-2026-109619) rated 9.2 under CVSS v4.0 could allow remote code execution without authentication.

“This is an urgent request for everyone to respond to tonight”

PM Takaichi's Urgent Call

Japanese Prime Minister Sanae Takaichi urged prompt patch application and temporarily suspending sites when patching is difficult.

“please make preparations so that it can be applied as swiftly as possible”

Patch Release Timeline

PHP patch released ahead of schedule at 10:40 p.m. Japan time on Oct. 21 (9:40 a.m. EDT on Oct. 21).

Affected PHP Versions

Affected PHP Versions

Fixed versions include PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 with end-of-support versions PHP 8.1 and earlier outside update scope.

Government Response

Japan's National Cybersecurity Office and Information-technology Promotion Agency issued advisories urging swift action.

Immediate Impact

CoDMON, Shadowverse: Worlds Beyond, BASE, and Sakura Internet services entered emergency maintenance or announced plans to do so.

Attack Potential

Exploiting the vulnerability could lead to website takeover, data theft, encryption, or ransomware attacks.

“Information leaks are a given, but there is also a high possibility that data will be encrypted and a ransom demanded, as in ransomware attacks”

Interim Measures

PHP lists interim measures like session.upload_progress.enabled=0 and memory_limit=-1 for temporary risk reduction.

Next Steps

System administrators must decide whether to apply the patch or take alternative measures until patching is complete.

The takeaway

Japanese Prime Minister Sanae Takaichi called for urgent PHP patch application after two critical vulnerabilities were found, with site shutdown as a temporary measure.

Read the original on BigGo Finance

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