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CVE-2026-39902— Cacti: Authenticated RCE on Data Input

Quick assessment

Affected
Cacti cacti
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.

Cacti 是一个开源的性能与故障管理框架。在 1.2.31 版本之前，其原有的黑名单（[;&

CVSS 7.2 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cacti cacti < 1.2.31 affected
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I. Basic Information for CVE-2026-39902

Vulnerability Information
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Vulnerability Title
Cacti: Authenticated RCE on Data Input
Source: CVE Program / CVE List V5
Vulnerability Description
Cacti is an open source performance and fault management framework. Prior to version 1.2.31, the prior blocklist ([;&| `$\\n\r]) omitted single-quote, double-quote, redirect operators, subshell parens and braces. An authenticated admin could save an input_string` containing single-quote, redirect operator, or subshell parens, and pass the check. This issue has been patched in version 1.2.31.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cacti cacti < 1.2.31 -

II. Public POCs for CVE-2026-39902

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III. Intelligence Information for CVE-2026-39902

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Vendor Advisories for CVE-2026-39902 (1)

Same Patch Batch · Cacti · 2026-10-23 · 3 CVEs total

CVE-2026-46531 5.5 MEDIUM Cacti: Authenticated Stored 2nd-Order SQL Injection in automation_tree_rule_items.field (i
CVE-2026-49442 5.3 MEDIUM Cacti: User Enumeration via Error Messages

IV. Related Vulnerabilities

Same product: cacti
Same vendor: Cacti
Same weakness: CWE-78

V. Comments for CVE-2026-39902

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