CVE-2026-40489Public exploit

Application crash via unbounded stack-buffer copy

Published Apr 18, 2026 · Updated Apr 18, 2026

Stack-based buffer overflow in EditorConfig Core C 0.12.10 and earlier allows attackers to crash applications via crafted paths and config data. The ec_glob function copies an attacker-influenced pattern into the fixed 8,194-byte l_pattern stack buffer with strcpy before checking its length. Triggering requires a user or tool to parse a file under the crafted directory tree; hardened Ubuntu builds abort with SIGABRT, interrupting the process.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in EditorConfig Core C 0.12.10 and earlier allows attackers to crash applications via crafted paths and config data. The ec_glob function copies an attacker-influenced pattern into the fixed 8,194-byte l_pattern stack buffer with strcpy before checking its length. Triggering requires a user or tool to parse a file under the crafted directory tree; hardened Ubuntu builds abort with SIGABRT, interrupting the process.

The record

CVE
CVE-2026-40489
Published
Apr 18, 2026
Updated
Apr 18, 2026
Vendor
EditorConfig
Product
EditorConfig Core C
Classifications
CWE-121, T1204.002, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 0.12.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

EditorConfig · EditorConfig Core Cversion=< 0.12.11

Published CVSS scores

5.5EditorConfigCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
8.6UbuntuCVSS:4.0/AV:L/AC:L/AT:N/PR:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1204.002User Execution: Malicious File
T1499Endpoint Denial of Service

Public exploit references

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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