2026-09-20T23:22:28.549Z
- publishedAt:
Not provided→ 2022-03-31T00:00:00.000Z
SOURCE-LINKED INTELLIGENCE
Facebook Internally Reported Failure of Ranking Algorithm, Exposing Harmful Content to Viewers over Months
Facebook's internal report showed an at-least six-month long alleged software bug that caused moderator-flagged posts and other harmful content to evade down-ranking filters, leading to surges of misinformation on users' News Feed.
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- recordType
- incident-report
- evidenceStatus
- reported
- region
- Global
Reported occurrence date: 2021-10-01T00:00:00.000Z
Evidence & attribution
- AI Incident Database
- AI Incident Database · 2022-03-31T00:00:00.000Z
AI Incident Database, Responsible AI Collaborative; McGregor (2021), Preventing Repeated Real World AI Failures by Cataloging Incidents. Incident-specific contributor credits are available at each citation link. Metadata adapted; article text excluded.
License: CC BY-SA 4.0
First collected: 2026-09-19T22:50:59.123Z. This is not the publication date.
Observed changes
AIIC observation times, not verified publisher revision times. Up to eight recent revisions.