# CVE-2026-86098

## Summary

- **CVE ID:** CVE-2026-86098
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-787
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 14, 2026

## Description

ntop nDPI versions before 6.0 contain a heap buffer overflow vulnerability in the ndpi_json_string_escape function that writes beyond caller-supplied buffer boundaries. Attackers can trigger the overflow by supplying crafted network packet data including TLS SNI, HTTP headers, or DNS names that reach the vulnerable function, causing heap corruption.

## Affected Products

- ntop — nDPI (0)
- ntop — nDPI (6.0)

## References

- [CNA](https://github.com/ntop/nDPI/commit/94e82c1de12323d992895830231865736a8abf2c)
- [CNA](https://github.com/ntop/nDPI)
- [CNA](https://github.com/ntop/nDPI/blob/5.0/src/lib/ndpi_serializer.c)
- [CNA](https://www.vulncheck.com/advisories/ntop-ndpi-before-6.0-heap-buffer-overflow-via-ndpi-json-string-escape)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._