Quick answers
- Is CVE-2026-86596 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86596 being exploited in the wild.
- How severe is CVE-2026-86596?
- Critical severity, with a CVSS score of 9.8, published 2 November 2026.
- Which products and versions are affected?
- s2Member up to and including 260927.
- Is there a fix for CVE-2026-86596?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-86596 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-86596?
- Check whether you run s2Member at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An insufficiently sanitized strip_php_tags_deep() function strips only literal '<?' sequences from the item_name parameter, but a post-interpolation placeholder cleanup mechanism reassembles valid '<?php' openers after the attacker-controlled value is embedded in an email template. Authenticated attackers with custom-level access or above can exploit this to execute arbitrary PHP code on the server.
Affected products
- s2Member s2Member up to and including 260927
Timeline
- 2026-11-02: disclosed