CVE-2026-55676
Authenticated upload role allows remote PHP execution via file-upload component.
Is CVE-2026-55676 being exploited?
Not confirmed. CVE-2026-55676 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-55676?
CVE-2026-55676 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-55676?
Yes. A fix has been recorded for CVE-2026-55676. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55676 affect?
CVE-2026-55676 affects Malcolm file-upload (FilePond PHP backend) < 26.06.1, Malcolm RBAC ROLE_UPLOAD, nginx + php-fpm serving /server/php/files. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55676?
Upgrade to Malcolm 26.06.1; restrict ROLE_UPLOAD and stop serving uploaded files via PHP.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated users with upload-only role can upload .php and execute arbitrary PHP as www-data, enabling remote code execution in the file-upload container.
Immediate action required
- affected< 26.06.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.