# Sustained censorship in TH (2026-05)

**Country:** 🇹🇭 Thailand (TH)
**Date:** 2026-05-02
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 8 days of elevated network interference averaging 63.4% anomaly rate.

## Metrics

- Confidence: 72%
- Measurements: 8
- Anomaly Rate: 63.4%

## Evidence

- **OONI** (measurement): OONI http_invalid_request_line: 4/7 measurements anomalous (57.1%)
  - Observed: 2026-05-20
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-05-20&until=2026-05-20&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/3 measurements anomalous (100.0%)
  - Observed: 2026-05-20
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-05-20&until=2026-05-20&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 3/6 measurements anomalous (50.0%)
  - Observed: 2026-05-06
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-05-06&until=2026-05-06&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/6 measurements anomalous (50.0%)
  - Observed: 2026-05-06
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-05-06&until=2026-05-06&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 3/4 measurements anomalous (75.0%)
  - Observed: 2026-05-03
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-05-03&until=2026-05-03&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/4 measurements anomalous (75.0%)
  - Observed: 2026-05-03
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-05-03&until=2026-05-03&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 5/10 measurements anomalous (50.0%)
  - Observed: 2026-05-02
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-05-02&until=2026-05-02&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 5/10 measurements anomalous (50.0%)
  - Observed: 2026-05-02
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-05-02&until=2026-05-02&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.
- **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 TH (2026-05) [TH-2026-0156]. Retrieved from https://voidly.ai/incident/TH-2026-0156

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*Report generated by Voidly Research on 2026-06-21*
*Data licensed under CC BY 4.0*
*Incident ID: TH-2026-0156*
*Permalink: https://voidly.ai/incident/TH-2026-0156*