# Sustained censorship in HK (2026-10)

**Country:** 🇭🇰 Hong Kong (HK)
**Date:** 2026-10-10
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 3 days of elevated network interference averaging 83.3% anomaly rate.

## Metrics

- Confidence: 72%
- Measurements (stored incident count; not the qualifying evidence count): 3
- Anomaly Rate: 83.3%

## Evidence

- **OONI** (measurement): OONI http_header_field_manipulation: 1 anomaly + 0 confirmed / 2 nonfailed measurements (50.0% blocked; 0 failed)
  - Observed: 2026-10-15
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=HK&test_name=http_header_field_manipulation&since=2026-10-15&until=2026-10-16)
- **OONI** (measurement): OONI facebook_messenger: 1 anomaly + 0 confirmed / 1 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-10
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=HK&test_name=facebook_messenger&since=2026-10-10&until=2026-10-11)
- **OONI** (measurement): OONI http_invalid_request_line: 1 anomaly + 0 confirmed / 1 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-10
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=HK&test_name=http_invalid_request_line&since=2026-10-10&until=2026-10-11)
- **OONI** (measurement): OONI http_header_field_manipulation: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-10-05
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=HK&test_name=http_header_field_manipulation&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/8 measurements anomalous (75.0%)
  - Observed: 2026-10-04
  - Confidence: 80%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=HK&test_name=http_header_field_manipulation&since=2026-10-04&until=2026-10-05&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.
- **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** — fewer than two source labels appear in qualifying linked evidence; stored incident source labels may include quarantined OONI observations.

## Data Sources

ooni

These source labels come from qualifying linked evidence. Historical incident source labels and quarantined observations are excluded; multiple labels alone do not establish independent corroboration.

## Citation

Voidly Research. (2026). Sustained censorship in HK (2026-10) [HK-2026-0088]. Retrieved from https://voidly.ai/incident/HK-2026-0088

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*Report generated by Voidly Research on 2026-10-17*
*Data licensed under CC BY 4.0*
*Incident ID: HK-2026-0088*
*Permalink: https://voidly.ai/incident/HK-2026-0088*