Quick answers
- Is CVE-2026-86098 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86098 being exploited in the wild.
- How severe is CVE-2026-86098?
- High severity, with a CVSS score of 7.4, published 4 September 2026.
- Which products and versions are affected?
- Ntop nDPI before 6.0.
- Is there a fix for CVE-2026-86098?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-86098 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-86098?
- Check whether you run Ntop nDPI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a heap buffer overflow in the ndpi_json_string_escape function that writes data beyond the bounds of a caller-supplied buffer. The function processes network protocol headers (TLS SNI, HTTP headers, DNS names) without proper length validation. An attacker can trigger the overflow by sending crafted network packets that reach the vulnerable function, resulting in heap memory corruption. No authentication or special privileges are required; the vulnerability is reachable via network traffic analysis. A patch is available in nDPI version 6.0 and later.
Affected products
- ntop nDPI before 6.0
Timeline
- 2026-09-04: disclosed