# CVE-2026-5450

> Vulnerability · severity: **CRITICAL** (CVSS 9.8).

## Description

Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.

## Key facts

- **CVE ID:** CVE-2026-5450
- **Published:** 2026-04-20
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.8
- **CWE codes:** CWE-122, CWE-787

## Affected products

- `gnu:glibc`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5450

## Citation

> AI Analytics. CVE-2026-5450. Retrieved 2026-09-06 from https://api.ai-analytics.org/cve/CVE-2026-5450. Derived from NIST NVD. Licensed CC0.

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