CVE-2026-93682 Affecting php8.5 package, versions <8.5.9-0ubuntu2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.35% (27th percentile)

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  • Snyk IDSNYK-UBUNTU2610-PHP85-21241550
  • published18 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-93682  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.10 php8.5 to version 8.5.9-0ubuntu2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php8.5 package and not the php8.5 package as distributed by Ubuntu. See How to fix? for Ubuntu:26.10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1