CVE-2026-40489

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.

Score

CVSS 4.0 8.6 High

Status

Deferred - security-advisories@github.com

Published

2026-04-18

Last modified

2026-10-26

Weaknesses

CWE-121, CWE-787

Affected products

• Editorconfig-core-c (Editorconfig)

References

• https://github.com/editorconfig/editorconfig-core-c/security/advisories/GHSA-97xg-vrcq-254h
• https://github.com/editorconfig/editorconfig-core-c/commit/5159be88ad50641d9843289adda791ba300421ff
• https://github.com/editorconfig/editorconfig-core-c/releases/tag/v0.12.11