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CVE-2026-6841: Reflected XSS in Request Tracker

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-21 · updated 2026-07-23
• Weakness: CWE-79

Description

Request Tracker is vulnerable to a reflected cross-site scripting (XSS) vulnerability via the "Page" parameter in GET requests. An attacker can craft a URL that, when opened, results in arbitrary JavaScript execution in the victim’s browser. This vulnerability affects versions from 5.0.4 up to 5.0.9 and from 6.0.0 up to 6.0.2.

Affected products

• Best Practical Request Tracker: from 5.0.4 before 5.0.10; from 6.0.0 before 6.0.3 — fixed in 5.0.10, 6.0.3

How to fix

Upgrade to a fixed version: Best Practical Request Tracker 5.0.10, 6.0.3. Check the vendor advisory for mitigations.

References

• https://cert.pl/en/posts/2026/05/CVE-2026-6841
• https://docs.bestpractical.com/release-notes/rt/5.0.10
• https://docs.bestpractical.com/release-notes/rt/6.0.3
• https://requesttracker.com/request-tracker/

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