---
id: "INC-gitbook-01M6FXDDGQRWHMYYWXY2REQ46X"
page: "https://infrastack.ai/live/INC-gitbook-01M6FXDDGQRWHMYYWXY2REQ46X"
kind: "incident"
aliases: []
title: "GitBook: Security incident impacting published sites and GitBook app"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "resolved"
category: "vendor"
products: [{"name": "GitBook", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["gitbook", "incident", "security", "self-hosted", "vendor"]
not_affected_if: ["no-gitbook-account"]
published_at: "2026-11-03T05:16:51+00:00"
first_seen_at: "2026-11-08T16:45:35+00:00"
updated_at: "2026-11-08T16:46:23+00:00"
sources: [{"source": "statuspage", "url": "https://www.gitbookstatus.com/incidents/01M6FXDDGQRWHMYYWXY2REQ46X", "first_seen_at": "2026-11-08T16:45:35+00:00"}]
exploit_sources: []
---

# GitBook: Security incident impacting published sites and GitBook app

Link for people: https://infrastack.ai/live/INC-gitbook-01M6FXDDGQRWHMYYWXY2REQ46X (this .md is for agents)

GitBook, a hosted documentation platform, had a security incident affecting published sites and the GitBook app, now resolved. The sources say customer data was accessible to an attacker, but the text here does not list which data or how access was gained.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:GitBook affected range not listed fixed no fixed version listed

## Timeline

- 2026-11-03T05:16:51+00:00 confirmed by GitBook (statuspage) https://www.gitbookstatus.com/incidents/01M6FXDDGQRWHMYYWXY2REQ46X "The post explains what happened, a full timeline, exactly which customer data was accessible, how we responded to protect our customers, and what we’re doing next."
- 2026-11-08T16:45:35+00:00 statuspage https://www.gitbookstatus.com/incidents/01M6FXDDGQRWHMYYWXY2REQ46X

## From the sources

As promised, now that the incident is resolved, we’ve published our full post-mortem on the recent security incident.

[**Read the full post-mortem**](https://www.gitbook.com/status/security-incident-2026-11-03)

The post explains what happened, a full timeline, exactly which customer data was accessible, how we responded to protect our customers, and what we’re doing next.

We apologize again for the disruption. We hold ourselves to the highest standards, and we know an incident like this affects the trust you place in GitBook. 

We hope the transparency in this post-mortem, our previous communications, and the actions we’ve taken help rebuild it.

If you have questions, contact your account manager or reply to this email to speak to our support team. For live updates, visit [status.gitbook.com](http://status.gitbook.com).

**Sara Tandowsky, GitBook CEO**
**Samy Pessé, GitBook Co-founder & CTO**

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_