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CVE-2026-102360— lib0 `readUint8Array` performs an unbounded read past the end of the decoder’s view, disclosing adjacent process memory

Quick assessment

Affected
dmonad lib0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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. never compares the wire-supplied length against the dec

CVSS 8.6 · High
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I. Basic Information for CVE-2026-102360

Vulnerability Information

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Vulnerability Title
lib0 `readUint8Array` performs an unbounded read past the end of the decoder’s view, disclosing adjacent process memory
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
dmonad lib0 <= 0.2.1-0.2.117 -

II. Public POCs for CVE-2026-102360

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III. Intelligence Information for CVE-2026-102360

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Other References for CVE-2026-102360 (3)

IV. Related Vulnerabilities

Same product: lib0
Same vendor: dmonad
Same weakness: CWE-125

V. Comments for CVE-2026-102360

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