CVE-2026-0858 is a Stored Cross-Site Scripting (XSS) vulnerability affecting PlantUML versions prior to 1.2026.0, stemming from insufficient sanitization of interactive attributes in GraphViz diagrams. This allows an attacker to inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in applications rendering the SVG. Rated Medium severity (CVSS 6.1), it requires user interaction (UI:R) but can be exploited remotely (AV:N) with low complexity (AC:L), potentially impacting confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.2026.0CPE matchmatch criteria | cpe:2.3:a:plantuml:plantuml:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS: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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.