CVE-2026-46387: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in OISF suricata
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.
AI Analysis
Technical Summary
Suricata's HTTP/2 decompression path before versions 7.0.16 and 8.0.5 lacks an effective upper bound on the decompressed response-body buffer size. An attacker can craft an HTTP/2 DATA payload with a high compression ratio (e.g., gzip, deflate, brotli) that causes Suricata to allocate excessive memory during decompression. This improper handling of highly compressed data (CWE-409) can lead to denial of service by exhausting system memory. The vulnerability is addressed in versions 7.0.16 and 8.0.5.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause Suricata to consume excessive memory by sending specially crafted compressed HTTP/2 payloads. This can result in denial of service (DoS) conditions due to resource exhaustion. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade Suricata to version 7.0.16 or 8.0.5 or later where the vulnerability is fixed. As a temporary workaround, disable HTTP/2 support to prevent exploitation of this issue. Patch status is not explicitly stated but the presence of fixed versions indicates an official fix is available.
CVE-2026-46387: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in OISF suricata
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata's HTTP/2 decompression path before versions 7.0.16 and 8.0.5 lacks an effective upper bound on the decompressed response-body buffer size. An attacker can craft an HTTP/2 DATA payload with a high compression ratio (e.g., gzip, deflate, brotli) that causes Suricata to allocate excessive memory during decompression. This improper handling of highly compressed data (CWE-409) can lead to denial of service by exhausting system memory. The vulnerability is addressed in versions 7.0.16 and 8.0.5.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause Suricata to consume excessive memory by sending specially crafted compressed HTTP/2 payloads. This can result in denial of service (DoS) conditions due to resource exhaustion. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade Suricata to version 7.0.16 or 8.0.5 or later where the vulnerability is fixed. As a temporary workaround, disable HTTP/2 support to prevent exploitation of this issue. Patch status is not explicitly stated but the presence of fixed versions indicates an official fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-13T19:53:47.922Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa2bd3eacd9273b49369fb2
Added to database: 09/10/2026, 14:22:54 UTC
Last enriched: 09/10/2026, 14:37:05 UTC
Last updated: 09/10/2026, 17:00:16 UTC
Views: 5
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