High severity · published Sep 10, 2026
CVE-2026-45751
Suricata detect/transform: use-after-free in dotprefix transform
7.5
CVSS
0.3%
EPSS
No
On KEV
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 inspection-buffer helper could leave an inspection pointer referencing freed memory after a chained transform caused the backing buffer to be reallocated. The issue is reached during a specific network traffic processing, and requires a specific but not malicious rule. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, avoid rules that chain `dotprefix` transform after another one.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
< 7.0.16; >= 8.0.0, < 8.0.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45751
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45751
Release Notes
https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315
Mitigation
https://github.com/OISF/suricata/security/advisories/GHSA-59q6-j4w8-8pjx
Permissions Required
https://redmine.openinfosecfoundation.org/issues/8537
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