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CVE-2026-102521: CWE-125: Out-of-bounds Read in dmonad lib0

0
High
VulnerabilityCVE-2026-102521cvecve-2026-102521cwe-125
Published: 09/29/2026 (09/29/2026, 13:14:49 UTC)
Source: CVE Database V5
Vendor/Project: dmonad
Product: lib0

Description

The decoder in `readFromDataView` in lib0 before 0.2.119 can be tricked into reading more than it should from a buffer. The vulnerability allows reading past the decoders' view, thus exposing adjacent process memory. This can be anything that is currently in the head, for example credentials or logs. This is similar to but different from GHSA-r5c8-rf4w-qrq8.

CVSS v3.1

Score 8.6high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected software

dmonad

lib0

Affected versions
<=0.2.118
GitHub Actionsmore threats →ai
dmonad/lib0
pkg:github/dmonad/lib0
Affected versions
<=0.2.118

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/29/2026, 13:47:44 UTC

Technical Analysis

The vulnerability exists in the `readFromDataView` decoder function in dmonad's lib0 library before version 0.2.119. The decoder can be manipulated to read beyond the allocated buffer, resulting in an out-of-bounds read (CWE-125). This allows an attacker to access adjacent memory regions that may contain sensitive information like credentials or logs. The CVSS v3.1 score is 8.6 (high), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and a confidentiality impact rated as high. There is no known exploit in the wild and no vendor advisory or patch information is provided.

Potential Impact

The vulnerability allows an attacker to read memory beyond the intended buffer boundary, potentially exposing sensitive information such as credentials or logs. There is no impact on integrity or availability. The confidentiality breach could lead to information disclosure risks depending on what adjacent memory contains.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Avoid using affected versions (<=0.2.118) if possible until a fix is available.

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Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-09-29T13:00:21.387Z
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6abbbe2df7a7c541067091ce

Added to database: 09/29/2026, 13:33:33 UTC

Last enriched: 09/29/2026, 13:47:44 UTC

Last updated: 09/29/2026, 18:20:13 UTC

Views: 8

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