# Sustained censorship in BR (2026-08)

**Country:** 🇧🇷 Brazil (BR)
**Date:** 2026-08-15
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 3 days of elevated network interference averaging 66.7% anomaly rate.

## Metrics

- Confidence: 69%
- Measurements: 3
- Anomaly Rate: 66.7%

## Evidence

- **OONI** (measurement): OONI web_connectivity for claude.ai: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-08-20
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=BR&test_name=web_connectivity&domain=claude.ai&since=2026-08-20&until=2026-08-21)
- **OONI** (measurement): OONI web_connectivity for chat.openai.com: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-08-19
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=BR&test_name=web_connectivity&domain=chat.openai.com&since=2026-08-19&until=2026-08-20)
- **OONI** (measurement): OONI web_connectivity for chat.openai.com: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-08-15
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=BR&test_name=web_connectivity&domain=chat.openai.com&since=2026-08-15&until=2026-08-16)

## 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.
- **A confirmed duration** — we report the observation window, not a verified start/stop of any block.
- **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 BR (2026-08) [BR-2026-0046]. Retrieved from https://voidly.ai/incident/BR-2026-0046

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*Report generated by Voidly Research on 2026-08-21*
*Data licensed under CC BY 4.0*
*Incident ID: BR-2026-0046*
*Permalink: https://voidly.ai/incident/BR-2026-0046*