# CVE-2026-28525

> Vulnerability · severity: **MEDIUM** (CVSS 6.8).

## Description

SWUpdate contains an integer underflow vulnerability in the multipart upload parser in mongoose_multipart.c that allows unauthenticated attackers to cause a denial of service by sending a crafted HTTP POST request to /upload with a malformed multipart boundary and controlled TCP stream timing. Attackers can trigger an integer underflow in the mg_http_multipart_continue_wait_for_chunk() function when the buffer length falls within a specific range, causing an out-of-bounds heap read that writes data beyond the allocated receive buffer to a local IPC socket.

## Key facts

- **CVE ID:** CVE-2026-28525
- **Published:** 2026-04-23
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.8
- **CWE codes:** CWE-125, CWE-191

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28525

## Citation

> AI Analytics. CVE-2026-28525. Retrieved 2026-07-18 from https://api.ai-analytics.org/cve/CVE-2026-28525. Derived from NIST NVD. Licensed CC0.

---

*[Dataset catalog](https://api.ai-analytics.org/datasets/) · [AI Analytics](https://api.ai-analytics.org/) · CC0 1.0*