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CVE-2026-45747

Oisf Suricata NULL pointer dereference

7.5 HIGHPublic exploitEPSS 0.42%
  1. Published10 Sept 2026

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.16, the Lua TLS certificate information helper could dereference NULL certificate fields when a Lua script requested certificate information for TLS traffic where some certificate fields were absent. Crafted TLS traffic processed by a deployment using affected Lua TLS scripting could crash Suricata, resulting in denial of service. Version 7.0.16 contains a fix. As a workaround, avoid Lua scripts that call TLS certificate information helpers on untrusted traffic (`TlsGetCertInfo` function), or update scripts to handle missing certificate fields where possible.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Oisf Suricata< 7.0.16

Remediation

Fixed in
Oisf Suricata≥ 7.0.16

References

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Frequently asked

Is CVE-2026-45747 being actively exploited?

CVE-2026-45747 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.42%.

How severe is CVE-2026-45747?

CVE-2026-45747 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2026-45747?

Affected products include Oisf Suricata.

How do I fix CVE-2026-45747?

Upgrade affected software to a fixed version, for example Oisf Suricata 7.0.16 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.