# CVE-2026-18743

## Summary

- **CVE ID:** CVE-2026-18743
- **Severity:** LOW
- **CVSS Score:** 2.5 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** CWE-131
- **Published:** Sep 1, 2026
- **Last Modified:** Sep 9, 2026

## Description

A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the `poptConfigFileToString` function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).

## Affected Products

- rpm-software-management — popt (1.11)
- Red Hat — Red Hat Hardened Images (1.19-11.1.hum1)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-18743)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2510809)
- [CNA](https://access.redhat.com/errata/RHSA-2026:56984)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 3.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._