CVE-2026-40079: Cacti is an open source performance and fault management framework

Q: How do I fix CVE-2026-40079?

cacti: upgrade to 1.2.31. Exact commands for each OS are on this page.

Q: Is CVE-2026-40079 being exploited?

CVE-2026-40079 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40079 affect?

CVE-2026-40079 affects cacti. Severity is critical (CVSS 9.8). Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escape_command() function. The escape_command() function at lib/rrd.php is

Q: How urgent is CVE-2026-40079?

Priority 62/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-40079 is a critical-severity flaw (CVSS 9.8) affecting cacti. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escape_command() function. The escape_command() function at lib/rrd.php is a no-op: it returns $command unchanged. The command line built by rrdtool_function_graph() is passed through this function and then to shell_exec($full_commandline). The risk is in __rrd_execute() where text_fo

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-78, CWE-88
Published	2026-06-25
Last modified	2026-06-26

Publisher (CNA): GitHub, Inc. · Vendor: cacti

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 00:17 UTCPublished CVE record published
2026-06-26 00:16 UTCUpdated Record last modified

cacti cacti UPGRADE

Affected: < 1.2.31

Fixed in: 1.2.31

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cacti || rpm -q cacti || cacti --version

2. UPGRADE to 1.2.31 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cacti

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cacti

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · python3.11 · FIXED · 3.11.18-1.fc46 · FEDORA-2026-cc775894f4 · source

sudo dnf upgrade --advisory=FEDORA-2026-cc775894f4

Debian 12 · cacti · NO FIX YET

Debian 13 · cacti · NO FIX YET

Alpine 3.24 · cacti · FIXED · cacti-1.2.31-0

apk add --upgrade cacti apk info -v cacti

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40079?

cacti: upgrade to 1.2.31. Exact commands for each OS are on this page.

Is CVE-2026-40079 being exploited?

CVE-2026-40079 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40079 affect?

CVE-2026-40079 affects cacti. Severity is critical (CVSS 9.8). Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escape_command() function. The escape_command() function at lib/rrd.php is

How urgent is CVE-2026-40079?

Priority 62/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-40083 HIGH 7.2 UPGRADE Cacti is an open source performance and fault management framework
CVE-2026-40080 MEDIUM 6.1 UPGRADE Cacti is an open source performance and fault management framework
CVE-2026-40082 MEDIUM 5.4 UPGRADE Cacti is an open source performance and fault management framework
CVE-2026-40084 MEDIUM 6.5 UPGRADE Cacti is an open source performance and fault management framework
CVE-2026-40941 MEDIUM 6.5 UPGRADE Cacti is an open source performance and fault management framework

References

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