Postmortem Index

Explore incident reports from various companies

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Category

Security

Outages caused by security incidents, mitigations, or hardening rollouts (revoked certs, blocked traffic, expired credentials).

Postmortems
51
Companies
28
Years covered
24
Date range
Aug 2003 – Feb 2026
Title Company Date Other categories
GitHub Actions and Codespaces outage of February 2026 GitHub 2026-02-02 – 2026-02-03
Automation Cascading Failure Config Change
Xubuntu.org download page compromised via WordPress vulnerability Xubuntu 2025-10-15 – 2025-10-19
GitHub DNS infrastructure failure and service degradation on October 11, 2024 GitHub 2024-10-11 – 2024-10-12
Automation Cascading Failure Config Change
GitHub.com database configuration change causes 36-minute outage GitHub 2024-08-14
Automation Config Change
CrowdStrike Falcon Content Update Incident of July 2024 CrowdStrike 2024-07-19
Automation Config Change
GitHub Copilot degradation on July 13, 2024 GitHub 2024-07-13
Automation Config Change
GitHub availability incidents May 9-11, 2023 GitHub 2023-05-09
Automation Config Change
Datadog Infrastructure Connectivity Issue March 2023 Datadog 2023-03-08 – 2023-03-10
Automation Cascading Failure Cloud
Cloudflare service token incident on January 24, 2023 Cloudflare 2023-01-24
Automation Cloud Config Change Hardware
CircleCI security incident and data exfiltration (December 2022) CircleCI 2022-12-16 – 2022-12-22
Cloud
GitHub mysql1 cluster repeated service disruptions (March 2022) GitHub 2022-03-16 – 2022-03-23
Automation Config Change
Okta third-party support engineer laptop compromise Okta 2022-01-16 – 2022-01-21
GitHub November 2021 Availability Incident due to MySQL Schema Migration Github 2021-11-27
Automation Cascading Failure Cloud Config Change
Google Cloud Networking issues in Europe and other regions on November 12, 2021 Google 2021-11-12
Automation Cloud Config Change Time
GitHub Actions and Pages impacted by scoped token INT32 overflow GitHub 2021-05-16
Automation Config Change
Cloudflare API and dashboard availability incident on 2020-11-02 Cloudflare 2020-11-02
Automation Cascading Failure
GitHub background job system degraded availability October 2020 GitHub 2020-10-09 – 2020-10-10
Automation Config Change
Datadog US region infrastructure connectivity issue DataDog 2020-09-24 – 2020-09-25
Automation Cascading Failure Cloud
Cloudflare outage on July 17, 2020 Cloudflare 2020-07-17
Config Change
GitHub February 2020 mysql1 service disruptions GitHub 2020-02-19 – 2020-02-27
Automation Config Change
Cloudflare global outage on July 2, 2019 Cloudflare 2019-07-02
Cascading Failure Config Change
Elastic Cloud AWS us-east-1 outage of February 2019 Elastic 2019-02-04
Automation Cascading Failure Cloud Config Change
GitHub October 2018 Service Degradation due to MySQL Failover GitHub 2018-10-21 – 2018-10-22
Automation Cloud Config Change Hardware
Homebrew GitHub token leak from Jenkins Homebrew 2018-07-31
Malicious Packages Published to npm ESLint 2018-07-12
Gentoo GitHub Organization compromise of June 2018 Gentoo 2018-06-28 – 2018-07-03
Automation
Travis CI database truncation and cross-account session exposure Travis CI 2018-03-13
Automation
Travis CI production database truncation TravisCI 2018-03-13
Automation Cloud
Square service disruption of March 16, 2017 Square 2017-03-16
Cloud Config Change
Cloudflare parser bug causes memory leak Cloudflare 2016-09-22 – 2017-02-18
Config Change
Reddit outage and degraded performance on August 11, 2016 Reddit 2016-08-11 – 2016-08-12
Automation Cloud Config Change Time
Sentry security incident Sentry 2016-06-12 – 2016-06-14
ShapeShift Cyberattack Shapeshift 2016-03-14 – 2016-04-09
Config Change
GitHub January 28th, 2016 datacenter power disruption GitHub 2016-01-28
Automation Cascading Failure Cloud Config Change Hardware
Google Compute Engine Persistent Disk issue in europe-west1-b Google 2015-08-13 – 2015-08-16
Cloud Hardware
EVE Online long downtime on July 15th, 2015 CCP Games 2015-07-15
Cloud Config Change Hardware
BrowserStack security incident due to Shellshock vulnerability on prototype machine BrowserStack 2014-11-09 – 2014-11-10
Automation Cloud
GitHub DDoS attack of March 2014 GitHub 2014-03-11
Automation Config Change Time
GitHub DNS Outage on January 8, 2014 GitHub 2014-01-08
Automation Cascading Failure Config Change
MongoHQ security breach impacting CircleCI customer data CircleCI 2013-10-27 – 2013-10-30
Automation Config Change
PagerDuty notification dispatch system outage of April 2013 Pagerduty 2013-04-13
Automation Cloud Config Change
GitHub.com outage of December 2012 GitHub 2012-12-22 – 2012-12-23
Automation Config Change
GitHub network problems on November 30, 2012 GitHub 2012-11-30 – 2012-12-01
Automation Config Change
GitHub.com availability issues in September 2012 GitHub 2012-09-10
Automation Config Change
Northeast blackout of 2003 FirstEnergy / General Electric 2003-08-14 – 2003-08-16
Cascading Failure Hardware
Untitled postmortem Elastic
Automation Cascading Failure Cloud Config Change
Engineering Archives Heroku
Cloud Config Change
GitHub availability incidents in February and March 2026 GitHub
Automation Cascading Failure Cloud Config Change
Multiple Slack service disruptions in October 2014 Slack
Automation Cascading Failure
Razorpay RDS Multi-AZ Failover and Data Loss in December 2019 Razorpay
Cloud Hardware
Sun Microsystems Enterprise server cache memory flaw Sun