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CVE-2026-45763— Suricata lua: sandbox allocation limit not enforced for new allocations

Quick assessment

Affected
OISF suricata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

oisf Suricata是oisf组织开源的一款网络入侵检测与防御软件。 oisf Suricata 8.0.0版本至8.0.5之前版本存在资源管理错误漏洞，该漏洞源于启用Lua规则执行时Lua沙箱内存限制未对所有新分配一致强制执行，特定Lua分配模式可超出security.lua.max-bytes限制而不触发预期内存限制，导致配置的沙箱限制不可靠。

CVSS 5.9 · Medium EPSS 0.62% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
OISF suricata >= 8.0.0, < 8.0.5 affected
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I. Basic Information for CVE-2026-45763

Vulnerability Information
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Vulnerability Title
Suricata lua: sandbox allocation limit not enforced for new allocations
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, when Lua rule execution is enabled, the Lua sandbox memory limit was not consistently enforced for new allocations. Certain Lua allocation patterns could exceed `security.lua.max-bytes` without triggering the intended memory limit, making the configured sandbox limit unreliable. This requires Lua rules to be enabled and an affected Lua script/rule to be loaded. Version 8.0.5 contains a fix. As a workaround, disable `security.lua.allow-rules` unless Lua rules are required.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
oisf Suricata 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
oisf Suricata是oisf组织开源的一款网络入侵检测与防御软件。 oisf Suricata 8.0.0版本至8.0.5之前版本存在资源管理错误漏洞，该漏洞源于启用Lua规则执行时Lua沙箱内存限制未对所有新分配一致强制执行，特定Lua分配模式可超出security.lua.max-bytes限制而不触发预期内存限制，导致配置的沙箱限制不可靠。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OISF suricata >= 8.0.0, < 8.0.5 -

II. Public POCs for CVE-2026-45763

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III. Intelligence Information for CVE-2026-45763

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Vendor Advisories for CVE-2026-45763 (1)

Vendor Pages for CVE-2026-45763 (1)

Other References for CVE-2026-45763 (1)

Same Patch Batch · OISF · 2026-09-10 · 15 CVEs total

CVE-2026-45764 9.1 CRITICAL Suricata http2: protocol-change type confusion can lead to denial of service
CVE-2026-45747 7.5 HIGH Suricata lua/tls: null dereference in TlsGetCertInfo
CVE-2026-46387 7.5 HIGH Suricata http2: decompression bomb can cause denial of service in Suricata
CVE-2026-45759 7.5 HIGH Suricata http1: quadratic Content-Disposition processing can lead to denial of service
CVE-2026-45762 7.5 HIGH Suricata defrag: missing address-family check can lead to remote crash
CVE-2026-45769 7.5 HIGH ikev2: unbounded client transform storage can lead to resource exhaustion
CVE-2026-45765 7.5 HIGH Suricata dnp3: unbounded reassembly can lead to resource exhaustion
CVE-2026-45770 7.5 HIGH Suricata lua: excessive flow variable registration can bypass sandbox
CVE-2026-45768 7.5 HIGH Suricata ldap: unbounded responses per transaction can lead to resource exhaustion
CVE-2026-45766 7.5 HIGH Suricata nfs: unbounded stateful structures can lead to resource exhaustion
CVE-2026-45751 5.9 MEDIUM Suricata detect/transform: use-after-free in dotprefix transform
CVE-2026-45752 5.9 MEDIUM Suricata detect/transform: use-after-free in decompress transforms
CVE-2026-45767 4.4 MEDIUM Suricata datasets: save to absolute filename can be bypassed when combined with load comma
CVE-2026-45761 3.3 LOW Suricata detect: case-insensitive frame handling can cause heap buffer overflow during rul

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-770