# Sustained censorship in SN (2026-10)

**Country:** 🇸🇳 Senegal (SN)
**Date:** 2026-10-07
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 3 days of elevated network interference averaging 70.0% anomaly rate.

## Metrics

- Confidence: 72%
- Measurements (stored incident count; not the qualifying evidence count): 3
- Anomaly Rate: 70.0%

## Evidence

- **OONI** (measurement): OONI http_header_field_manipulation: 4 anomaly + 0 confirmed / 8 nonfailed measurements (50.0% blocked; 0 failed)
  - Observed: 2026-10-20
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-20&until=2026-10-21)
- **OONI** (measurement): OONI http_header_field_manipulation: 3 anomaly + 0 confirmed / 5 nonfailed measurements (60.0% blocked; 0 failed)
  - Observed: 2026-10-14
  - Confidence: 74%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-14&until=2026-10-15)
- **OONI** (measurement): OONI http_header_field_manipulation: 1 anomaly + 0 confirmed / 1 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI http_header_field_manipulation: 3/6 measurements anomalous (50.0%)
  - Observed: 2026-10-03
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/10 measurements anomalous (70.0%)
  - Observed: 2026-10-02
  - Confidence: 78%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 11/21 measurements anomalous (52.4%)
  - Observed: 2026-10-02
  - Confidence: 71%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 10/16 measurements anomalous (62.5%)
  - Observed: 2026-10-01
  - Confidence: 75%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 10/19 measurements anomalous (52.6%)
  - Observed: 2026-10-01
  - Confidence: 71%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/12 measurements anomalous (50.0%)
  - Observed: 2026-10-01
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=SN&test_name=http_header_field_manipulation&since=2026-10-01&until=2026-10-02&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.
- **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 SN (2026-10) [SN-2026-0037]. Retrieved from https://voidly.ai/incident/SN-2026-0037

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*Report generated by Voidly Research on 2026-10-23*
*Data licensed under CC BY 4.0*
*Incident ID: SN-2026-0037*
*Permalink: https://voidly.ai/incident/SN-2026-0037*