# CVE-2026-56132

## Summary

- **CVE ID:** CVE-2026-56132
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L)
- **CWE:** CWE-821
- **Published:** Jun 19, 2026
- **Last Modified:** Jun 22, 2026

## Description

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

## Affected Products

- libexpat project — libexpat (0)

## References

- [CNA](https://github.com/libexpat/libexpat/pull/1272)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 1.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._