# CVE-2026-86507: Apache Roller: Stored XSS in comment moderation via comment author URL

> An attacker can inject malicious scripts via comment author URLs, potentially compromising moderator sessions in Apache Roller.

- **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:** 28 Sep 2026
- **Also known as:** GHSA-4hv4-w9v7-8mr5

## What is CVE-2026-86507?

CVE-2026-86507 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 in Apache Roller 6.1.5 allows an anonymous remote attacker to store a crafted comment-author URL that can execute script in the session of a weblog moderator or global administrator when the comment management page is viewed. This affects sites that permit comments on at least one weblog and whose moderator subsequently reviews the submitted comment; no non-default server setting is required. Users are recommended to upgrade to Apache Roller 6.1.6 or later.

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

## Which versions are affected by CVE-2026-86507?


## How do I fix CVE-2026-86507?

No fix has been published for CVE-2026-86507 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86507 being exploited?

There is no known exploitation of CVE-2026-86507 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86507 and fix it if it is affected.

What it is: CVE-2026-86507 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-2026-86507 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-2026-86507/ (Markdown: https://insights.sbomify.com/CVE-2026-86507/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86507
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86507
- OSV: https://osv.dev/vulnerability/CVE-2026-86507

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-86507/
Summaries are generated and may contain mistakes; the official description above is the record.