CVE-2026-54859
ThemeREX Preservation
- ThemeREX Preservation
- Critical
- CVSS 9.8
- No fixed version listed
Summary
Unauthenticated PHP Object Injection in Preservation <= 1.15 versions.
From the CVE record.
What to do
No fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| ThemeREX Preservation | from n/a through 1.15 | None listed |
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.8 (v3.1, scored by Patchstack)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 29, 2026.
- Weakness
- CWE-502: Deserialization of Untrusted Data
- Vendor
- ThemeREX, Preservation
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.