# CVE-2026-46387

## Summary

- **CVE ID:** CVE-2026-46387
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-409
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata's HTTP/2 decompression path could grow the decompressed response-body buffer without an effective upper bound. A crafted HTTP/2 DATA payload using a high compression ratio, such as gzip, deflate, or brotli compressed data, could cause Suricata to allocate excessive memory while decompressing the payload. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP2.

## Affected Products

- OISF — suricata (< 7.0.16)
- OISF — suricata (>= 8.0.0, < 8.0.5)

## References

- [CNA](https://github.com/OISF/suricata/security/advisories/GHSA-45p7-j5wm-8wrx)
- [CNA](https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315)
- [CNA](https://redmine.openinfosecfoundation.org/issues/8513)

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