CVE-2026-81889
elFinder URL upload SSRF via DNS rebinding allows internal responses to be saved and exposed.
Is CVE-2026-81889 being exploited?
Not confirmed. CVE-2026-81889 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 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-81889?
CVE-2026-81889 is rated High with a CVSS score of 8.6. 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-2026-81889?
Yes. A fix has been recorded for CVE-2026-81889. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-81889 affect?
CVE-2026-81889 affects elFinder < 2.1.70, php/elFinder.class.php, Web apps using elFinder URL upload. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-81889?
Upgrade elFinder to 2.1.70; disable or restrict URL uploads until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
SSRF via URL uploads and DNS rebinding lets attackers fetch internal HTTP resources and save responses as readable uploaded files, exposing internal data.
Patch when possible
- affected< 2.1.70
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.