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PHP Warns of New Code Execution Flaw Days After PHP2Shell Patches

PHP has warned of a new code execution vulnerability, tracked as CVE-2026-115560, only days after shipping emergency patches for the critical PHP2Shell flaws, Security Affairs reports. Users are advised to disable session upload progress until an official fix is available.

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PHP has warned of a new code execution vulnerability just days after releasing emergency patches for the critical PHP2Shell flaws, according to a report by Security Affairs.

The newly disclosed issue is tracked as CVE-2026-115560. According to the source, PHP describes the flaw as unlikely to be exploited, because it affects only a specific PHP configuration rather than default or common setups. Even so, the project has issued a precautionary recommendation: users should disable the session upload progress feature until an official fix is released. Session upload progress is a PHP feature that allows applications to monitor the state of file uploads, and the advisory indicates that turning it off removes exposure to the flaw in the meantime.

The timing of the disclosure is notable. As reported by Security Affairs, the warning arrived only two days after PHP shipped emergency patches addressing the PHP2Shell vulnerabilities, which were treated as critical. The back-to-back advisories mean administrators running PHP may face a second round of mitigation work in the same week, first applying the PHP2Shell fixes and now adjusting configurations to address CVE-2026-115560.

The source report does not provide further technical details on the vulnerability, such as the precise configuration required for exploitation, the list of affected PHP versions, or a confirmed release date for the forthcoming patch. Security Affairs notes that the information available comes from PHP's own warning, and that administrators should watch for the official fix while applying the recommended workaround in the interim.

Source: Security Affairs

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