# CVE-2026-82546: Apache Roller: Stored cross-site scripting through incoming Trackback links

> Unauthenticated attackers can inject malicious scripts via Trackback links in Apache Roller, leading to script execution in the victim's browser.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 28 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-mw5j-2pgh-fm6m

## What is CVE-2026-82546?

CVE-2026-82546 is a medium-severity cross-site scripting vulnerability in Apache Roller, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows an unauthenticated remote attacker to store a crafted comment-author URL through the incoming Trackback endpoint when a published entry accepts comments and Trackbacks. The shipped Trackback, verification and moderation defaults allow the value to be approved and rendered as an active link; a visitor who clicks the link executes script in the weblog's origin. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which removes incoming Trackback support and suppresses non-HTTP(S) comment-author links. Users unable to upgrade should disable Trackbacks and remove untrusted Trackback comments.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-82546?


## How do I fix CVE-2026-82546?

No fix has been published for CVE-2026-82546 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-82546 being exploited?

There is no known exploitation of CVE-2026-82546 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82546 and fix it if it is affected.

What it is: CVE-2026-82546 is a medium-severity cross-site scripting vulnerability in Apache Roller, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-82546 in the wild and no public exploit code.

Affected product: Apache Roller. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-82546/ (Markdown: https://insights.sbomify.com/CVE-2026-82546/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82546
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82546
- OSV: https://osv.dev/vulnerability/CVE-2026-82546

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82546/
Summaries are generated and may contain mistakes; the official description above is the record.