[ CVE-2026-93682 · Published 25 Sep 2026 ]
Vulnerability in PHP Group PHP
[ Why it matters ]Priority signals
- Public proof-of-concept exploit exists (CISA SSVC)
[ Description ]Official description
When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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BSI CERT-BundWID-SEC-2026-3585
PHP: Multiple vulnerabilities Translated from German
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CERT-FRCERTFR-2026-AVI-1227
Multiple vulnerabilities in PHP Translated from French
Multiple vulnerabilities have been discovered in PHP. Some of them allow an attacker to cause remote denial of service, a breach of data confidentiality and a breach of data integrity.