# CVE-2026-53529: LeafWiki vulnerable to stored XSS via search-result title (highlight() returns raw title into dangerouslySetInnerHTML)

> Attackers with editor permissions can inject scripts into page titles, executing code in victims' browsers via search results.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-j344-qxqm-wg64

## What is CVE-2026-53529?

CVE-2026-53529 is a medium-severity cross-site scripting vulnerability in perber leafwiki, published on 21 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

LeafWiki is a self-hosted wiki. Prior to version 0.10.2, page titles returned by the search API could be rendered as raw HTML in the frontend. A user with editor or administrator permissions could create or modify a page title containing an HTML/JavaScript payload. When another user searched for a matching term, the payload could execute in the victim’s browser. The impact depends on deployment configuration. With `--public-access` enabled, unauthenticated visitors could be affected. In authenticated-only deployments, the issue could be used for cross-user XSS against logged-in users who can access search results. The issue has been fixed in version 0.10.2 by ensuring that author-controlled page titles in search results are not interpreted as raw HTML by the browser while preserving search result highlighting.

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

## Which versions are affected by CVE-2026-53529?


## How do I fix CVE-2026-53529?

No fix has been published for CVE-2026-53529 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53529 being exploited?

There is no known exploitation of CVE-2026-53529 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53529 and fix it if it is affected.

What it is: CVE-2026-53529 is a medium-severity cross-site scripting vulnerability in perber leafwiki, published on 21 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-53529 in the wild and no public exploit code.

Affected product: perber leafwiki. 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-2026-53529/ (Markdown: https://insights.sbomify.com/CVE-2026-53529/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53529
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53529
- OSV: https://osv.dev/vulnerability/CVE-2026-53529

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-53529/
Summaries are generated and may contain mistakes; the official description above is the record.