CVE-2026-40489 Details
Description
editorconfig-core-c is an EditorConfig core library for use by plugins supporting EditorConfig parsing. Versions up to and including 0.12.10 have a stack-based buffer overflow in ec_glob() that allows an attacker to crash any application using libeditorconfig by providing a specially crafted directory structure and .editorconfig file. This is an incomplete fix for CVE-2023-0341. The pcre_str buffer was protected in 0.12.6 but the adjacent l_pattern[8194] stack buffer received no equivalent protection. On Ubuntu 24.04, FORTIFY_SOURCE converts the overflow to SIGABRT (DoS). Version 0.12.11 contains an updated fix.
A stack-based buffer overflow vulnerability has been identified in the EditorConfig Core C library, specifically in versions through 0.12.10. The issue arises in the ec_glob() function, where an unbounded strcpy operation allows an attacker to overwrite the stack. This vulnerability can be exploited by crafting a specific directory structure and .editorconfig file, leading to a crash of any application that uses libeditorconfig. On Ubuntu 24.04, this overflow is converted into a SIGABRT signal, causing a denial-of-service condition. This vulnerability represents an incomplete fix for CVE-2023-0341, as the pcre_str buffer was properly protected in version 0.12.6, but the adjacent l_pattern stack buffer remained vulnerable.
Users can upgrade to EditorConfig Core C version 0.12.11, which includes a proper fix for this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 18, 2026CISA-ADP
Assessed Apr 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/editorconfig/editorconfig-core-c/commit/5159be88ad50641d9843289adda791ba300421ff | [email protected] | Source CodeVendor |
| https://github.com/editorconfig/editorconfig-core-c/releases/tag/v0.12.11 | [email protected] | Release NotesVendor |
| https://github.com/editorconfig/editorconfig-core-c/security/advisories/GHSA-97xg-vrcq-254h | [email protected] | AdvisoryExploitTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| editorconfig-core-c | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 18, 2026 | New CVE Received | [email protected] |