CVE-2026-68746Network attack vectorHinoki check available

Unauthenticated full access via fail-open identity status

Published Aug 5, 2026 · Updated Aug 5, 2026

Authentication bypass in Livebook 0.19.7 through 0.19.8 allows remote attackers to obtain full server access through Livebook Teams. Livebook.Hubs.TeamClient.handle_call/3 treats an unresolved cached deployment_group_id as disabled identity enforcement, so authentication returns empty identity data and creates a full-access user. The state arises when an authorized Teams user deletes the deployment group while its agent is disconnected or reconnecting; any network client can then read notebooks and secrets, execute code, and interrupt the service.

CVSS severity7.7
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Livebook 0.19.7 through 0.19.8 allows remote attackers to obtain full server access through Livebook Teams. Livebook.Hubs.TeamClient.handle_call/3 treats an unresolved cached deployment_group_id as disabled identity enforcement, so authentication returns empty identity data and creates a full-access user. The state arises when an authorized Teams user deletes the deployment group while its agent is disconnected or reconnecting; any network client can then read notebooks and secrets, execute code, and interrupt the service.

The record

CVE
CVE-2026-68746
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Dashbit
Product
Livebook
Classifications
CWE-636, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.19.7 <0.19.9
  2. Affected versionversion=0.19.7-cuda12 <0.19.9-cuda12
  3. Affected versionversion=fc2c87c6b0276705281842acbe17142d1ac4d555 <* changes=[{"at":"d374e90647edbb00286bfee9182c0161d29a8e07","status":"unaffected"},{"at":"d6d0dfa746b172540442852f74de4a9deacc433b","status":"unaffected"},{"at":"2d3a2c710c880abd24a2bc888d3cf5239d98cf72","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dashbit · Livebookversion=0.19.7 <0.19.9; version=0.19.7-cuda12 <0.19.9-cuda12; version=fc2c87c6b0276705281842acbe17142d1ac4d555 <* changes=[{"at":"d374e90647edbb00286bfee9182c0161d29a8e07","status":"unaffected"},{"at":"d6d0dfa746b172540442852f74de4a9deacc433b","status":"unaffected"},{"at":"2d3a2c710c880abd24a2bc888d3cf5239d98cf72","status":"unaffected"}]

Published CVSS scores

7.7GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-636Not Failing Securely ('Failing Open')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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