CVE-2026-39897Network attack vector

Pre-auth script execution via reflected footer output

Published Jun 24, 2026 · Updated Jun 24, 2026

Reflected XSS in Cacti 1.2.30 and earlier allows remote attackers to execute script in a user's browser through a crafted request. The record identifies html_auth_footer error-message output but does not disclose which request value reaches the sink or how it is reflected. No authentication is required, but user interaction is required; the maintainer also states that the function is absent from 1.2.x, conflicting with the listed range.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Cacti 1.2.30 and earlier allows remote attackers to execute script in a user's browser through a crafted request. The record identifies html_auth_footer error-message output but does not disclose which request value reaches the sink or how it is reflected. No authentication is required, but user interaction is required; the maintainer also states that the function is absent from 1.2.x, conflicting with the listed range.

The record

CVE
CVE-2026-39897
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Cacti Group
Product
Cacti
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=< 1.2.31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Cacti Group · Cactiversion=< 1.2.31

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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