# Sustained censorship in SG (2026-05)

**Country:** 🇸🇬 Singapore (SG)
**Date:** 2026-05-06
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 18 days of elevated network interference averaging 63.6% anomaly rate.

## Metrics

- Confidence: 77%
- Measurements: 18
- Anomaly Rate: 63.6%

## Evidence

- **OONI** (measurement): OONI facebook_messenger: 4/5 measurements anomalous (80.0%)
  - Observed: 2026-05-27
  - Confidence: 82%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=facebook_messenger&since=2026-05-27&until=2026-05-27&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 2/2 measurements anomalous (100.0%)
  - Observed: 2026-05-27
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=facebook_messenger&since=2026-05-27&until=2026-05-27&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/4 measurements anomalous (75.0%)
  - Observed: 2026-05-27
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-27&until=2026-05-27&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 2/3 measurements anomalous (66.7%)
  - Observed: 2026-05-25
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=facebook_messenger&since=2026-05-25&until=2026-05-25&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 7/7 measurements anomalous (100.0%)
  - Observed: 2026-05-25
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=facebook_messenger&since=2026-05-25&until=2026-05-25&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 6/8 measurements anomalous (75.0%)
  - Observed: 2026-05-24
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=facebook_messenger&since=2026-05-24&until=2026-05-24&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 6/10 measurements anomalous (60.0%)
  - Observed: 2026-05-23
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=facebook_messenger&since=2026-05-23&until=2026-05-23&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-05-17
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_invalid_request_line&since=2026-05-17&until=2026-05-17&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 1/2 measurements anomalous (50.0%)
  - Observed: 2026-05-17
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-17&until=2026-05-17&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/6 measurements anomalous (50.0%)
  - Observed: 2026-05-13
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-13&until=2026-05-13&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 3/6 measurements anomalous (50.0%)
  - Observed: 2026-05-13
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_invalid_request_line&since=2026-05-13&until=2026-05-13&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/6 measurements anomalous (50.0%)
  - Observed: 2026-05-13
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-13&until=2026-05-13&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 10/18 measurements anomalous (55.6%)
  - Observed: 2026-05-12
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_invalid_request_line&since=2026-05-12&until=2026-05-12&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 10/18 measurements anomalous (55.6%)
  - Observed: 2026-05-12
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-12&until=2026-05-12&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 11/19 measurements anomalous (57.9%)
  - Observed: 2026-05-12
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_invalid_request_line&since=2026-05-12&until=2026-05-12&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 11/19 measurements anomalous (57.9%)
  - Observed: 2026-05-12
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-12&until=2026-05-12&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 5/9 measurements anomalous (55.6%)
  - Observed: 2026-05-06
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_invalid_request_line&since=2026-05-06&until=2026-05-06&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 5/9 measurements anomalous (55.6%)
  - Observed: 2026-05-06
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=SG&test_name=http_header_field_manipulation&since=2026-05-06&until=2026-05-06&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 SG (2026-05) [SG-2026-0184]. Retrieved from https://voidly.ai/incident/SG-2026-0184

---
*Report generated by Voidly Research on 2026-06-21*
*Data licensed under CC BY 4.0*
*Incident ID: SG-2026-0184*
*Permalink: https://voidly.ai/incident/SG-2026-0184*