CVE-2026-63452: oisf suricata Uncontrolled Resource Consumption
Vulnerability summary
CVE-2026-63452 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in oisf suricata. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.5% of scored vulnerabilities.
Timeline
- 18-09-2026PublishedVulnerability first disclosed.
- 21-09-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.63%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
+0.27 pp
From 0.36% on 22-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-409Improper Handling of Highly Compressed Data (Data Amplification)The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.
Affected systems
Debian1 product
- suricataAll versions (No fix recorded) | < 1:8.0.6-1
Oisf1 product
- suricata≥ 8.0.0, < 8.0.6
Ubuntu1 product
- suricataAll versions (No fix recorded)
3 vendors · 3 products
References
8 links- github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84X Refsource CONFIRMREPORTMitigationVendor Advisory
