CVE-2026-40489 editorconfig-core-c has incomplete fix for CVE-2023-0341
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-40489?
CVE-2026-40489 is a high-severity vulnerability in editorconfig-core-c, published on 18 Apr 2026.
Official 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.
Which versions are affected by CVE-2026-40489?
Linux distribution packages (5)
editorconfig-core-c SUSE:Linux Enterprise Module for Development Tools 15 SP7 | All versions | 0.12.6-150600.3.6.1 |
editorconfig-core-c SUSE:Linux Enterprise Server 16.0 | All versions | 0.12.9-160000.3.1 |
editorconfig-core-c SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 0.12.9-160000.3.1 |
editorconfig-core-c openSUSE:Leap 16.0 | All versions | 0.12.9-160000.3.1 |
editorconfig-core-c openSUSE:Tumbleweed | All versions | 0.12.11-1.1 |
How do I fix CVE-2026-40489?
Upgrade to a fixed version.
Is CVE-2026-40489 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40489 exists.
Sources
Also known as DEBIAN-CVE-2026-40489, GHSA-97xg-vrcq-254h, OESA-2026-2258, OESA-2026-2259, OESA-2026-2260, SUSE-SU-2026:22125-1 and 6 more.