Vulnerability · Published Apr 18, 2026 · Assigned by GitHub_M
CVE-2026-40489editorconfig-core-c has incomplete fix for CVE-2023-0341
High 8.6
In plain English
A high-severity stack buffer overflow in editorconfig-core-c from editorconfig. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | editorconfig | 0.12.11-r0 | ALPINE-CVE-2026-40489 |
| Debian:12 | editorconfig-core | no fix listed | DEBIAN-CVE-2026-40489 |
| Debian:13 | editorconfig-core | no fix listed | DEBIAN-CVE-2026-40489 |
| Debian:14 | editorconfig-core | no fix listed | DEBIAN-CVE-2026-40489 |
| Ubuntu:24.04:LTS | editorconfig-core | 0.12.7-0.1ubuntu0.1 | UBUNTU-CVE-2026-40489 |
| Ubuntu:25.10 | editorconfig-core | 0.12.9+~0.17.1-1ubuntu2.1 | UBUNTU-CVE-2026-40489 |
| Ubuntu:26.04:LTS | editorconfig-core | 0.12.10+~0.17.1-3ubuntu0.1 | UBUNTU-CVE-2026-40489 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| editorconfig | editorconfig-core-c | < 0.12.11 |
Weakness: CWE-121, CWE-787 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/editorconfig/editorconfig-core-c/security/advisories/GHSA-97xg-vrcq-254h x_refsource_CONFIRM
- https://github.com/editorconfig/editorconfig-core-c/commit/5159be88ad50641d9843289adda791ba300421ff x_refsource_MISC
- https://github.com/editorconfig/editorconfig-core-c/releases/tag/v0.12.11 x_refsource_MISC