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CVE-2026-39955

Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php

9.8 CriticalFix available

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. 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
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.58%Up 0.3 points since Jun 25, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.8

Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. This issue has been fixed in version 1.2.31.

Record
CVE-2026-39955
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-89
Updated
2026-11-02
EUVDEUVD-2026-39137 9.8

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. This issue has been fixed in version 1.2.31.

Record
EUVD-2026-39137
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
NVD 9.8

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. This issue has been fixed in version 1.2.31.

Record
CVE-2026-39955
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-89
Updated
2026-11-02
OSV 9.8

Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. This issue has been fixed in version 1.2.31.

Record
CVE-2026-39955
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-89
Updated
2026-11-02
OSVDEBIAN-CVE-2026-39955 9.8

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. This issue has been fixed in version 1.2.31.

Record
DEBIAN-CVE-2026-39955
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-39955 9.8

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php. This issue has been fixed in version 1.2.31.

Record
UBUNTU-CVE-2026-39955
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
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
RecordedChangedSources
first indexedCVE List, EUVD, NVD, OSV

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

In short

CVE-2026-39955 is a critical vulnerability (CVSS 9.8) in Cacti, published June 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.58%, the 48th percentile. Fixed in cacti 1.2.31+ds1-1.

References

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