CVE-2026-93682

medium

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.

References

https://github.com/php/php-src/security/advisories/GHSA-7875-c8px-7q5f

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-87321

Details

Source: Mitre, NVD

Published: 2026-09-25

Updated: 2026-09-29

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Severity: Medium

EPSS

EPSS: 0.00354