# CVE-2026-86738: Snipe-IT before 8.7.0 CSS Injection via Custom CSS

> Superusers can inject malicious CSS to steal CSRF tokens from other superusers, leading to account takeover in Snipe-IT.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-hxfh-ccwg-qrc6, GHSA-pvcw-mp8q-mj39

## What is CVE-2026-86738?

CVE-2026-86738 is a critical cross-site scripting vulnerability in Snipeitapp Snipe-It, published on 8 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Snipe-IT versions before 8.7.0 contain a CSS injection vulnerability in the Custom CSS field due to incomplete sanitization that reverses HTML encoding on greater-than and double-quote characters. Superusers can plant malicious CSS payloads using @import and url() references to exfiltrate CSRF tokens from other superusers via attribute-selector rules, enabling account takeover.

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

## Which versions are affected by CVE-2026-86738?

It affects 1 product.


Products: Snipeitapp Snipe-It.

## How do I fix CVE-2026-86738?

No fix has been published for CVE-2026-86738 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86738 being exploited?

There is no known exploitation of CVE-2026-86738 in the wild and no public exploit code.

## Other vulnerabilities in Snipeitapp Snipe-It

- [CVE-2025-63601](https://insights.sbomify.com/CVE-2025-63601/): File upload in n/a (critical 9.9)
- [CVE-2026-37709](https://insights.sbomify.com/CVE-2026-37709/): Snipe-IT has insecure permissions in file uploads (critical 9.8)
- [CVE-2026-116199](https://insights.sbomify.com/CVE-2026-116199/): Snipe-IT before 8.6.3 Authentication Bypass via Google SSO Callback (critical 9.2)
- [CVE-2022-1380](https://insights.sbomify.com/CVE-2022-1380/): Stored Cross Site Scripting vulnerability in Item name parameter in snipe/snipe-it (critical 9.1)
- [CVE-2022-1445](https://insights.sbomify.com/CVE-2022-1445/): Stored Cross Site Scripting vulnerability in the checked_out_to parameter in snipe/snipe-it (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86738 and fix it if it is affected.

What it is: CVE-2026-86738 is a critical cross-site scripting vulnerability in Snipeitapp Snipe-It, published on 8 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-86738 in the wild and no public exploit code.

Affected product: Snipeitapp Snipe-It. 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-2026-86738/ (Markdown: https://insights.sbomify.com/CVE-2026-86738/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86738
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86738
- OSV: https://osv.dev/vulnerability/CVE-2026-86738

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86738/
Summaries are generated and may contain mistakes; the official description above is the record.