CVE-2026-45763Network attack vector

Service interruption via unchecked Lua allocations

Published Sep 10, 2026 · Updated Sep 10, 2026

Resource exhaustion in Suricata 8.0.0 through 8.0.4 allows remote attackers to interrupt service through a loaded Lua rule. The Lua sandbox's allocation accounting does not apply security.lua.max-bytes consistently when a rule requests new memory. Exposure requires Lua rules to be enabled and an affected script to be loaded; crafted traffic can then drive memory beyond the configured ceiling and interrupt the sensor.

CVSS severity5.9
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Suricata 8.0.0 through 8.0.4 allows remote attackers to interrupt service through a loaded Lua rule. The Lua sandbox's allocation accounting does not apply security.lua.max-bytes consistently when a rule requests new memory. Exposure requires Lua rules to be enabled and an affected script to be loaded; crafted traffic can then drive memory beyond the configured ceiling and interrupt the sensor.

The record

CVE
CVE-2026-45763
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 8.0.0, < 8.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=>= 8.0.0, < 8.0.5

Published CVSS scores

5.9GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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