High severity · published Apr 2, 2026
CVE-2026-31932
Suricata krb5: quadratic complexity in krb5 buffering
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, inefficiency in KRB5 buffering can lead to performance degradation. This issue has been patched in versions 7.0.15 and 8.0.4.
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 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
< 7.0.15; >= 8.0.0, < 8.0.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31932
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-31932
Vendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-rp9m-jcpw-hggr
Issue Tracking
https://redmine.openinfosecfoundation.org/issues/8305
More from suricata
9.8
CVE-2026-22262
Suricata datasets: stack overflow when saving a set
9.8
CVE-2023-35853
In Suricata before 6.0.13, an adversary who controls an external source of Lua rules may be able to execute Lua code
9.8
CVE-2021-37592
Suricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a certain sequence of segments
9.8
CVE-2018-10244
Suricata version 4.0.4 incorrectly handles the parsing of an EtherNet/IP PDU
9.4
CVE-2026-94084
Suricata before 8.0.7 has an Http2ThreadMultiBuf use-after-free when a transaction is inspected by rules that use http.response_header with and without a transform