# CVE-2026-58028: Pretty-printed API output combined with centralauthtoken allows XSS with certain gadgets

> Attackers can execute arbitrary scripts via XSS in MediaWiki API output when using CentralAuth, potentially compromising user accounts.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Jul 2026
- **Updated:** 1 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-58028, GHSA-jqc3-4vrw-8965, MINI-cg49-8px4-hv37, MINI-pc67-px3c-xcmc, MINI-rc7q-5vv5-jmv6, UBUNTU-CVE-2026-58028

## What is CVE-2026-58028?

CVE-2026-58028 is a cross-site scripting vulnerability in Mediawiki Mediawiki, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation CentralAuth.

 This vulnerability is associated with program files includes/Api/ApiFormatBase.Php, includes/Api/ApiHelp.Php, includes/ResourceLoader/Module.Php, includes/Hooks/Handlers/PageDisplayHookHandler.Php, includes/LogFormatter/PermissionChangeLogFormatter.Php.

This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9; CentralAuth: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

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

## Which versions are affected by CVE-2026-58028?

It affects 1 product.


Products: Mediawiki Mediawiki.

## How do I fix CVE-2026-58028?

Upgrade to a fixed version.

## Is CVE-2026-58028 being exploited?

There is no known exploitation of CVE-2026-58028 in the wild and no public exploit code.

## Other vulnerabilities in Mediawiki Mediawiki

- [CVE-2023-37303](https://insights.sbomify.com/CVE-2023-37303/): Denial of service in n/a (critical 9.8)
- [CVE-2022-29904](https://insights.sbomify.com/CVE-2022-29904/): SQL injection in n/a (critical 9.8)
- [CVE-2022-29906](https://insights.sbomify.com/CVE-2022-29906/): Missing authorization in n/a (critical 9.8)
- [CVE-2022-28205](https://insights.sbomify.com/CVE-2022-28205/): Business logic in n/a (critical 9.8)
- [CVE-2022-28206](https://insights.sbomify.com/CVE-2022-28206/): Missing authorization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58028 and fix it if it is affected.

What it is: CVE-2026-58028 is a cross-site scripting vulnerability in Mediawiki Mediawiki, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-58028 in the wild and no public exploit code.

Affected product: Mediawiki Mediawiki. 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-2026-58028/ (Markdown: https://insights.sbomify.com/CVE-2026-58028/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58028
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58028
- OSV: https://osv.dev/vulnerability/CVE-2026-58028

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-58028/
Summaries are generated and may contain mistakes; the official description above is the record.