CVE-2026-78551
Login endpoint allows user enumeration, password brute-force, and can cause application DoS.
Is CVE-2026-78551 being exploited?
Not confirmed. CVE-2026-78551 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 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-78551?
CVE-2026-78551 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-2026-78551?
Yes. A fix has been recorded for CVE-2026-78551. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-78551 affect?
CVE-2026-78551 affects RansomLook (login endpoint), Gunicorn workers (app), Reverse proxy (X-Forwarded-For handling). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-78551?
Apply vendor patch, enable rate-limiting, and verify proxy X-Forwarded-For trust
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers can enumerate valid usernames via timing, perform unlimited password brute-force/credential-stuffing, and exhaust Gunicorn workers to cause DoS.
Immediate action required
- affected<= 2.0.0
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.