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GNU LibreDWG EUVD-2026-31745

| CVE-2026-9504 LOW
Out-of-bounds Read (CWE-125)
2026-05-25 VulDB GHSA-7fc3-9hrj-6779
Information Disclosure Buffer Overflow Libredwg
1.9
CVSS 4.0 · NVD

Severity by source

NVD PRIMARY
1.9 LOW
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Jun 08, 2026 - 13:00 vuln.today
Analysis Generated
Jun 08, 2026 - 13:00 vuln.today
CVSS changed
May 26, 2026 - 16:22 NVD
3.3 (LOW) 1.9 (LOW)

DescriptionCVE.org

A weakness has been identified in GNU LibreDWG up to 0.14. Affected is the function bit_convert_TU of the file programs/dwggrep.c of the component Dwggrep Utility. This manipulation causes out-of-bounds read. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. Patch name: be996bf2178a40e98720f18c2414815d244413db. Applying a patch is the recommended action to fix this issue.

AnalysisAI

Out-of-bounds read in GNU LibreDWG's dwggrep utility exposes heap memory when processing maliciously crafted DWG files containing LTYPE objects with unterminated wide-character dash text strings. Affected versions span 0.1 through 0.14 (CPE: cpe:2.3:a:gnu:libredwg). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Gain local OS access (PR:L)
Delivery
Craft R2007+ DWG file with malformed LTYPE dash text
Exploit
Supply crafted file to dwggrep execution
Execution
Trigger unbounded bit_convert_TU read past strings_area
Impact
Leak partial adjacent heap memory contents
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Vulnerability AssessmentAI

Exploitation The attacker must have local access to the system with at least low-privilege OS credentials (CVSS PR:L, AV:L). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Real-world risk is very low across all available signals. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with local OS access places a specially crafted DWG file containing an LTYPE object whose R2007+ dash text field points to a wide-character string that is not null-terminated within the strings_area buffer, then induces a user or automated process to run dwggrep against the file. The original unbounded bit_convert_TU call reads beyond the strings_area allocation, potentially leaking a small number of adjacent heap bytes into output or accessible memory. …
Remediation The upstream fix is available as commit be996bf2178a40e98720f18c2414815d244413db in the LibreDWG GitHub repository (https://github.com/LibreDWG/libredwg/commit/be996bf2178a40e98720f18c2414815d244413db). … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-31745 vulnerability details – vuln.today
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