# CVE-2026-82546: Apache Roller stored cross-site scripting in Trackback comments

Source: https://junglewise.ai/threats/cve-2026-82546-improper-neutralization-of-input-during-web-page-generation-cross  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-28. Updated: 2026-09-28  
License: CC BY 4.0 with a link back

CVE-2026-82546 · Severity: medium · CVSS 6.1 · Published 2026-09-28

Apache Roller is a blogging platform that allows visitors to leave comments and trackbacks on published entries. An unauthenticated attacker can inject malicious code into a comment's author URL via the Trackback feature, which gets stored and rendered to other visitors. When a visitor clicks the malicious link, the attacker's script executes in the context of the blog, potentially stealing session cookies or performing unauthorized actions on behalf of the victim.

Technologies: [Apache Roller](https://junglewise.ai/threats/technologies/roller). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-82546 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82546 being exploited in the wild.

**How severe is CVE-2026-82546?** Medium severity, with a CVSS score of 6.1, published 28 September 2026.

**Which products and versions are affected?** Apache Roller 6.1.5 and earlier.

**Is there a fix for CVE-2026-82546?** A patch was published on 2026-09-06: Trackback support removed in 6.1.6 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-82546 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-82546?** Check whether you run Apache Roller at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a stored cross-site scripting (XSS) vulnerability in Apache Roller's Trackback endpoint that accepts unauthenticated comment-author URLs. The vulnerability exists because Trackback comments are approved by default and the URL field is rendered without proper sanitization or escaping. An attacker can craft a non-HTTP(S) URL (e.g., javascript: scheme) that executes when clicked, affecting any blog visitor. The fix removes Trackback support entirely and properly escapes comment-author links.

## Affected products

- Apache Roller 6.1.5 and earlier

## Timeline

- 2026-09-28: disclosed
- 2026-09-06: patched: Trackback support removed in 6.1.6

## References

- [https://github.com/apache/roller/pull/178](https://github.com/apache/roller/pull/178)
- [https://lists.apache.org/thread/ddrykzvs67zpmzwsbqyfjmlydboln8x1](https://lists.apache.org/thread/ddrykzvs67zpmzwsbqyfjmlydboln8x1)

## Related threats

- [Apache Roller XML-RPC deserialization remote code execution](https://junglewise.ai/threats/cve-2026-123374-deserialization-of-untrusted-data-vulnerability-in-apache-roller)
- [Apache Roller missing authorization in entry editor](https://junglewise.ai/threats/cve-2026-122300-missing-authorization-vulnerability-in-apache-roller-4-0-through)
- [Apache Roller stored cross-site scripting in weblog menu](https://junglewise.ai/threats/cve-2026-118414-improper-neutralization-of-input-during-web-page-generation)
- [Apache Roller stored cross-site scripting in blogroll import](https://junglewise.ai/threats/cve-2026-118413-improper-neutralization-of-input-during-web-page-generation)
- [Apache Roller CSRF allowing unauthenticated administrator account creation](https://junglewise.ai/threats/cve-2026-118411-cross-site-request-forgery-csrf-in-apache-roller-5-0-1-through-6)