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CVE-2026-0858

PlantUML is vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams

5.1 MediumFix available

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Active

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

0.34%Up 0.3 points since Jan 16, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.1

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
CVE-2026-0858
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2026-2918 5.1

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
EUVD-2026-2918
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
Updated
2026-11-02
GitHub AdvisoriesGHSA-hrvf-g648-rf3m 2.0

PlantUML is vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
GHSA-hrvf-g648-rf3m
CVSS 4.0
2.0 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
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
NVD 2.0

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
CVE-2026-0858
CVSS 4.0
2.0 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/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 2.0

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
CVE-2026-0858
CVSS 4.0
2.0 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
Weakness
CWE-79
Updated
2026-11-02
OSVDEBIAN-CVE-2026-0858 2.0

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
DEBIAN-CVE-2026-0858
CVSS 4.0
2.0 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/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
Updated
2026-11-02
OSVGHSA-hrvf-g648-rf3m 2.0

PlantUML is vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
GHSA-hrvf-g648-rf3m
CVSS 4.0
2.0 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
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
OSVUBUNTU-CVE-2026-0858 2.0

Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.

Record
UBUNTU-CVE-2026-0858
CVSS 4.0
2.0 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
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

Affected packages

Affected packages
PackageAffectedFixed
net.sourceforge.plantuml:plantuml
Maven
 before 1.2026.0
1.2026.0
plantuml
Debian:12
 All versions, plus listed versions
1:1.2020.2+ds-31:1.2020.2+ds-41:1.2020.2+ds-51:1.2020.2+ds-61:1.2026.2+ds-11:1.2026.2+ds-21:1.2026.2+ds-3
 None known
plantuml
Debian:13
 All versions, plus listed versions
1:1.2020.2+ds-61:1.2026.2+ds-11:1.2026.2+ds-21:1.2026.2+ds-3
 None known
plantuml
Debian:14
 All versions, plus listed versions
1:1.2020.2+ds-61:1.2026.2+ds-11:1.2026.2+ds-21:1.2026.2+ds-3
 None known
net.sourceforge.plantuml:plantuml
Maven
 before 1.2026.0, plus listed versions
1.2017.121.2017.131.2017.141.2017.151.2017.16
Show 45 moreShow less
1.2017.181.2017.191.2017.201.2018.01.2018.11.2018.101.2018.111.2018.121.2018.131.2018.141.2018.21.2018.31.2018.41.2018.51.2018.61.2018.71.2018.81.2018.91.2019.01.2019.11.2019.101.2019.111.2019.121.2019.131.2019.21.2019.31.2019.41.2019.51.2019.61.2019.71.2019.81.2019.91.2020.01.2020.11.2020.101.2020.111.2020.121.2020.131.2020.141.2020.151.2020.161.2020.171.2020.181.2020.191.2020.2
1.2026.0
plantuml
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
8024-28024-2ubuntu0.1~esm1
 None known
plantuml
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
8039-11:1.2017.15-11:1.2017.15-1ubuntu0.1~esm1
 None known
plantuml
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
1:1.2018.13+ds-21:1.2018.13+ds-2ubuntu0.1~esm1
 None known
plantuml
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:1.2020.2+ds-11:1.2020.2+ds-1ubuntu0.1
 None known
plantuml
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:1.2020.2+ds-31:1.2020.2+ds-3ubuntu11:1.2020.2+ds-3ubuntu1.1
 None known
plantuml
Ubuntu:25.10
 All versions, plus listed versions
1:1.2020.2+ds-6
 None known
plantuml
Ubuntu:26.10
 All versions, plus listed versions
1:1.2020.2+ds-6build1
 None known
plantuml
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:1.2020.2+ds-61:1.2020.2+ds-6build1
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-0858 is a medium vulnerability (CVSS 5.1) in Plantuml, published January 16, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.34%, the 27th percentile. Fixed in net.sourceforge.plantuml:plantuml 1.2026.0.

References

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