Answer in brief
CVE-2026-68746 records a High severity (CVSS 7.7) vulnerability in Livebook Teams identity check fails open when the deployment group is unresolvable, allowing unauthenticated access. The current sources do not mark it as known exploited. The current feed maps livebook-dev/livebook (generic), livebook-dev/livebook (generic), livebook-dev/livebook (generic), livebook-dev/livebook-dev/livebook (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps livebook-dev/livebook (generic), livebook-dev/livebook (generic), livebook-dev/livebook (generic), livebook-dev/livebook-dev/livebook (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:livebook:livebook:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| livebook-dev/livebookgeneric | >=0.19.7 <0.19.9 || >=0.19.7-cuda12 <0.19.9-cuda12 | 0.19.9, 0.19.9-cuda12 |
| livebook-dev/livebookgeneric | >=fc2c87c6b0276705281842acbe17142d1ac4d555 <* | * |
| livebook-dev/livebookgeneric | >=0.19.7 <0.19.9 | 0.19.9 |
| livebook-dev/livebook-dev/livebookgeneric | >=0.19.7 <0.19.9 || >=0.19.7-cuda12 <0.19.9-cuda12 | 0.19.9, 0.19.9-cuda12 |
| livebook-dev/livebook-dev/livebookgeneric | >=fc2c87c6b0276705281842acbe17142d1ac4d555 <* | * |
Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
Not Failing Securely ('Failing Open') vulnerability in livebook-dev livebook allows an unauthenticated network client to obtain full access to a Livebook server that enforces identity through Livebook Teams. A Livebook Agent or App Server connected to Livebook Teams caches the identifier of the deployment group it belongs to, and resolves that identifier against a locally cached list of deployment groups on every request in order to decide whether Teams identity enforcement is active. Livebook.Hubs.TeamClient.handle_call/3 in lib/livebook/hubs/team_client.ex does not distinguish a deployment group that could not be resolved from one that was resolved with identity enforcement switched off: the clause matches only the case where a group was found with enforcement enabled, and falls through to a catch-all that reports enforcement as switched off for everything else. The two neighbouring functions that decide user and application access resolve the same identifier and treat the same unresolved result as a denial. When the identity status is reported as switched off, Livebook.ZTA.LivebookTeams.authenticate/3 in lib/livebook/zta/livebook_teams.ex returns empty identity metadata and allows the request to continue instead of halting it. LivebookWeb.UserPlug.build_current_user/3 merges that empty metadata into a newly built user, whose access type defaults to full access, and LivebookWeb.AuthPlug.authorized?/1 grants access to any user holding full access. The cached identifier becomes unresolvable when the deployment group it refers to is deleted while the agent is not connected to receive the change, most concretely when a deployment group is deleted during the window in which an agent is disconnected or reconnecting. The client removes the group from its cached list without clearing the identifier that refers to it. Any client able to reach the affected server over the network is then granted the same access as a fully privileged member of the organisation, including the ability to read notebooks and configured secrets, execute code on the server's runtime, and disrupt its operation. This issue affects livebook: from 0.19.7 before 0.19.9.
Quoted source text, attributed separately from HOL analysis.