CVE-2026-63452
Suricata http1: repeated brotli compression bombs can cause excessive CPU consumption
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the HTTP/1 parser limits decompression work per transaction but does not limit how many small brotli compression bombs a single flow can submit. With response-body-decompress-layer-limit enabled, repeated compressed responses make the decompression paths in rust/htp perform expensive work for every transaction, degrading packet processing and potentially causing loss of monitoring visibility or denial of service. This issue is fixed in version 8.0.6.
INFO
Published Date :
Sept. 18, 2026, 9:17 p.m.
Last Modified :
Sept. 28, 2026, 6:40 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Suricata to version 8.0.6 or later.
- Apply security patches to Suricata.
- Monitor network traffic for suspicious activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63452.
| URL | Resource |
|---|---|
| https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f | Patch |
| https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88 | Patch |
| https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 | Release Notes |
| https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84 | Mitigation Vendor Advisory |
| https://redmine.openinfosecfoundation.org/issues/8694 | Permissions Required |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63452 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63452
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63452 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63452 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 28, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.6 Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f Types: Patch Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84 Types: Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://redmine.openinfosecfoundation.org/issues/8694 Types: Permissions Required -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 21, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-63452', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-21T18:19:39.620230Z'} -
New CVE Received by [email protected]
Sep. 18, 2026
Action Type Old Value New Value Added Description Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the HTTP/1 parser limits decompression work per transaction but does not limit how many small brotli compression bombs a single flow can submit. With response-body-decompress-layer-limit enabled, repeated compressed responses make the decompression paths in rust/htp perform expensive work for every transaction, degrading packet processing and potentially causing loss of monitoring visibility or denial of service. This issue is fixed in version 8.0.6. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-400 Added CWE CWE-409 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/63xxx/CVE-2026-63452.json">CVE-2026-63452</a> Added Reference https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f Added Reference https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88 Added Reference https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 Added Reference https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84 Added Reference https://redmine.openinfosecfoundation.org/issues/8694