# Sustained censorship in CU (2026-03)

**Country:** 🇨🇺 Cuba (CU)
**Date:** 2026-03-02
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 31 days of elevated network interference averaging 91.2% anomaly rate.

## Metrics

- Confidence: 85%
- Measurements: 31
- Anomaly Rate: 91.2%

## Evidence

- **OONI** (measurement): OONI facebook_messenger: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-29
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=facebook_messenger&since=2026-03-29&until=2026-03-30&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-29
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-29&until=2026-03-30&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-27
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-27&until=2026-03-28&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-27
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-27&until=2026-03-28&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 2/4 measurements anomalous (50.0%)
  - Observed: 2026-03-23
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-23&until=2026-03-24&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-03-23
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=facebook_messenger&since=2026-03-23&until=2026-03-24&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 2/2 measurements anomalous (100.0%)
  - Observed: 2026-03-17
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-17&until=2026-03-18&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-03-16
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-16&until=2026-03-17&only=anomalies)
- **OONI** (measurement): OONI tor: 2/4 measurements anomalous (50.0%)
  - Observed: 2026-03-16
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-16&until=2026-03-17&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-14
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-14&until=2026-03-15&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-14
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-14&until=2026-03-15&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-13
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-13&until=2026-03-14&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-12
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-12&until=2026-03-13&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-11
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=facebook_messenger&since=2026-03-11&until=2026-03-12&only=anomalies)
- **OONI** (measurement): OONI signal: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-11
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=signal&since=2026-03-11&until=2026-03-12&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-11
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=whatsapp&since=2026-03-11&until=2026-03-12&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-11
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=facebook_messenger&since=2026-03-11&until=2026-03-12&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-11
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-11&until=2026-03-12&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-10
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-10&until=2026-03-11&only=anomalies)
- **OONI** (measurement): OONI web_connectivity: 98/110 measurements anomalous (89.1%)
  - Observed: 2026-03-09
  - Confidence: 86%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=web_connectivity&since=2026-03-09&until=2026-03-10&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-08
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=http_header_field_manipulation&since=2026-03-08&until=2026-03-09&only=anomalies)
- **OONI** (measurement): OONI telegram: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-08
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=telegram&since=2026-03-08&until=2026-03-09&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-08
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=facebook_messenger&since=2026-03-08&until=2026-03-09&only=anomalies)
- **OONI** (measurement): OONI tor: 2/2 measurements anomalous (100.0%)
  - Observed: 2026-03-08
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-08&until=2026-03-09&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-07
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-07&until=2026-03-08&only=anomalies)
- **OONI** (measurement): OONI tor: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-03-07
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-07&until=2026-03-08&only=anomalies)
- **OONI** (measurement): OONI signal: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=signal&since=2026-03-06&until=2026-03-07&only=anomalies)
- **OONI** (measurement): OONI telegram: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=telegram&since=2026-03-06&until=2026-03-07&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=facebook_messenger&since=2026-03-06&until=2026-03-07&only=anomalies)
- **OONI** (measurement): OONI tor: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-03-02
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=tor&since=2026-03-02&until=2026-03-03&only=anomalies)
- **OONI** (measurement): OONI web_connectivity: 38/43 measurements anomalous (88.4%)
  - Observed: 2026-03-02
  - Confidence: 85%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CU&test_name=web_connectivity&since=2026-03-02&until=2026-03-03&only=anomalies)

## What we cannot say

- **Who caused it** — measurement data alone does not attribute the interference to any government, ISP, or other actor.
- **Intent** — anomalous or unreachable measurements indicate interference, not a stated motive or a deliberate-vs-incidental determination.
- **Which networks** — no specific ASN/ISP is identified for this incident.
- **The mechanism** — we cannot state whether this was DNS tampering, TLS/SNI reset, HTTP blockpage, throttling, or an infrastructure outage.
- **Sub-national scope** — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.
- **Independent corroboration** — this rests on a single source; treat it as a single-source signal, not a multi-source confirmation.

## Data Sources

ooni

## Citation

Voidly Research. (2026). Sustained censorship in CU (2026-03) [CU-2026-0159]. Retrieved from https://voidly.ai/incident/CU-2026-0159

---
*Report generated by Voidly Research on 2026-08-05*
*Data licensed under CC BY 4.0*
*Incident ID: CU-2026-0159*
*Permalink: https://voidly.ai/incident/CU-2026-0159*