CVE-2026-39897

Cacti has a Reflected XSS Vulnerability via html_auth_footer

5.3 MediumFix available

Cacti is an open source performance and fault management framework. Versions 1.2.30 and below contain a Reflected XSS vulnerability in the html_auth_footer. This issue has been fixed in version 1.2.31.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.26%Unchanged since Jun 25, 2026

What each source reports

CVE List Score used 5.3

Cacti has a Reflected XSS Vulnerability via html_auth_footer

Record: CVE-2026-39897
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2026-39133 5.3

Record: EUVD-2026-39133
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-02

NVD 5.3

Record: CVE-2026-39897
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 5.3

Cacti has a Reflected XSS Vulnerability via html_auth_footer

Record: CVE-2026-39897
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-79
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-39897 6.1

Record: DEBIAN-CVE-2026-39897
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-39897 5.3

Record: UBUNTU-CVE-2026-39897
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

Affected products

cacti

Affected packages

Affected packages
Package	Affected	Fixed
`cacti` Debian:12	All versions, plus listed versions 1.2.24+ds1-11.2.24+ds1-1+deb12u11.2.24+ds1-1+deb12u21.2.24+ds1-1+deb12u31.2.24+ds1-1+deb12u4 Show 17 moreShow less 1.2.24+ds1-1+deb12u51.2.25+ds1-11.2.25+ds1-21.2.26+ds1-11.2.27+ds1-11.2.27+ds1-21.2.28+ds1-11.2.28+ds1-21.2.28+ds1-31.2.28+ds1-41.2.30+ds1-11.2.30+ds1-21.2.30+ds1-31.2.31+ds1-11.2.31+ds1-21.2.31+ds1-31.2.31+ds1-4	None known
`cacti` Debian:13	All versions, plus listed versions 1.2.30+ds1-11.2.30+ds1-21.2.30+ds1-31.2.31+ds1-11.2.31+ds1-21.2.31+ds1-31.2.31+ds1-4	None known
`cacti` Debian:14	before 1.2.31+ds1-1, plus listed versions 1.2.30+ds1-11.2.30+ds1-21.2.30+ds1-3	1.2.31+ds1-1
`cacti` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 0.8.8b+dfsg-30.8.8b+dfsg-50.8.8b+dfsg-5ubuntu0.10.8.8b+dfsg-5ubuntu0.20.8.8b+dfsg-5ubuntu0.2+esm10.8.8b+dfsg-5ubuntu0.2+esm2	None known
`cacti` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 0.8.8f+ds1-20.8.8f+ds1-30.8.8f+ds1-40.8.8f+ds1-4ubuntu10.8.8f+ds1-4ubuntu2 Show 7 moreShow less 0.8.8f+ds1-4ubuntu30.8.8f+ds1-4ubuntu40.8.8f+ds1-4ubuntu4.16.040.8.8f+ds1-4ubuntu4.16.04.10.8.8f+ds1-4ubuntu4.16.04.20.8.8f+ds1-4ubuntu4.16.04.2+esm10.8.8f+ds1-4ubuntu4.16.04.2+esm2	None known
`cacti` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.1.18+ds1-11.1.27+ds1-21.1.27+ds1-31.1.28+ds1-21.1.35+ds1-1 Show 5 moreShow less 1.1.36+ds1-11.1.38+ds1-11.1.38+ds1-1ubuntu0.1~esm11.1.38+ds1-1ubuntu0.1~esm31.1.38+ds1-1ubuntu0.1~esm4	None known
`cacti` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 1.2.4+ds1-2ubuntu31.2.9+ds1-1ubuntu11.2.9+ds1-1ubuntu21.2.10+ds1-1ubuntu11.2.10+ds1-1ubuntu1+esm11.2.10+ds1-1ubuntu1.11.2.10+ds1-1ubuntu1.1+esm11.2.10+ds1-1ubuntu1.1+esm2	None known
`cacti` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 1.2.16+ds1-2ubuntu11.2.19+ds1-2ubuntu11.2.19+ds1-2ubuntu1+esm11.2.19+ds1-2ubuntu1.11.2.19+ds1-2ubuntu1.1+esm11.2.19+ds1-2ubuntu1.1+esm2	None known
`cacti` Ubuntu:24.04:LTS	All versions, plus listed versions 1.2.25+ds1-21.2.26+ds1-11.2.26+ds1-1ubuntu0.1	None known
`cacti` Ubuntu:25.10	All versions, plus listed versions 1.2.28+ds1-4ubuntu11.2.30+ds1-1ubuntu1	None known
`cacti` Ubuntu:26.10	All versions, plus listed versions 1.2.30+ds1-1ubuntu21.2.30+ds1-1ubuntu31.2.31+ds1-3ubuntu2	None known
`cacti` Ubuntu:26.04:LTS	All versions, plus listed versions 1.2.30+ds1-1ubuntu11.2.30+ds1-1ubuntu2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-39897 is a medium vulnerability (CVSS 5.3) in Cacti, published June 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. Fixed in cacti 1.2.31+ds1-1.