# CVE-2026-26345: SPIP < 4.4.8 Cross-Site Scripting in Public Area

> Authenticated users can inject malicious scripts via inadequate sanitization, allowing attackers to execute code and modify data in victim browsers.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/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:** Yes
- **Published:** 19 Feb 2026
- **Updated:** 5 Mar 2026
- **Also known as:** DEBIAN-CVE-2026-26345, GHSA-7wc5-wjpj-2r5j, UBUNTU-CVE-2026-26345

## What is CVE-2026-26345?

CVE-2026-26345 is a high-severity cross-site scripting vulnerability in Spip Spip, published on 19 Feb 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

SPIP before 4.4.8 contains a stored cross-site scripting (XSS) vulnerability in the public area triggered in certain edge-case usage patterns. The echapper_html_suspect() function does not adequately sanitize user-controlled content, allowing authenticated users with content-editing privileges (e.g., author-level roles and above) to inject malicious scripts. The injected payload may be rendered across multiple pages within the framework and execute in the browser context of other users, including administrators. Successful exploitation can allow attackers to perform actions in the security context of the victim user, including unauthorized modification of application state. This vulnerability is not mitigated by the SPIP security screen.

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

## Which versions are affected by CVE-2026-26345?

It affects 1 product.


Products: Spip Spip.

## How do I fix CVE-2026-26345?

Upgrade to a fixed version.

## Is CVE-2026-26345 being exploited?

There is no known exploitation of CVE-2026-26345 in the wild and no public exploit code.

## Other vulnerabilities in Spip Spip

- [CVE-2012-4331](https://insights.sbomify.com/CVE-2012-4331/): Other in n/a (critical 10.0)
- [CVE-2008-5812](https://insights.sbomify.com/CVE-2008-5812/): Other in n/a (critical 10.0)
- [CVE-2024-8517](https://insights.sbomify.com/CVE-2024-8517/): SPIP Bigup Multipart File Upload OS Command Injection (critical 9.8)
- [CVE-2023-24258](https://insights.sbomify.com/CVE-2023-24258/): SQL injection in n/a (critical 9.8)
- [CVE-2017-9736](https://insights.sbomify.com/CVE-2017-9736/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-26345 and fix it if it is affected.

What it is: CVE-2026-26345 is a high-severity cross-site scripting vulnerability in Spip Spip, published on 19 Feb 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-2026-26345 in the wild and no public exploit code.

Affected product: Spip Spip. 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-2026-26345/ (Markdown: https://insights.sbomify.com/CVE-2026-26345/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-26345
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26345
- OSV: https://osv.dev/vulnerability/CVE-2026-26345

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-26345/
Summaries are generated and may contain mistakes; the official description above is the record.