Description
A missing bounds check in the binary decoder in lib0, versions 0.2.1-0.2.117 and earlier and 1.0.0-rc.32 and earlier, lets any unauthenticated remote peer read adjacent process memory and receive it back. `readUint8Array` never compares the wire-supplied length against the decoder's own view, so one over-long length prefix returns whatever the host process allocated next: other tenants' document content, personal data, and live bearer session tokens**, recovered in full and at will. An attacker who can supply bytes to a lib0 decoder which means any peer that can open a socket, including before authentication reads adjacent process memory and, where the consumer echoes, stores or re-serves the decoded value, receives it back. This is patched in version 0.2.118 and 1.0.0-rc.33.
Published: 2026-09-29
Score: 8.6 High
EPSS: < 1% Very Low
KEV: No
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Remediation

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History

Wed, 30 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Dmonad
Dmonad lib0
Vendors & Products Dmonad
Dmonad lib0

Tue, 29 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 29 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Description A missing bounds check in the binary decoder in lib0, versions 0.2.1-0.2.117 and earlier and 1.0.0-rc.32 and earlier, lets any unauthenticated remote peer read adjacent process memory and receive it back. `readUint8Array` never compares the wire-supplied length against the decoder's own view, so one over-long length prefix returns whatever the host process allocated next: other tenants' document content, personal data, and live bearer session tokens**, recovered in full and at will. An attacker who can supply bytes to a lib0 decoder which means any peer that can open a socket, including before authentication reads adjacent process memory and, where the consumer echoes, stores or re-serves the decoded value, receives it back. This is patched in version 0.2.118 and 1.0.0-rc.33.
Title lib0 `readUint8Array` performs an unbounded read past the end of the decoder’s view, disclosing adjacent process memory
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-29T13:55:21.424Z

Reserved: 2026-09-28T22:38:42.255Z

Link: CVE-2026-102360

cve-icon Vulnrichment

Updated: 2026-09-29T13:55:16.782Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T14:17:20.117

Modified: 2026-09-30T19:38:27.293

Link: CVE-2026-102360

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T20:42:06Z

Weaknesses