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Snipe-IT CVE-2026-55466

| EUVDEUVD-2026-42996 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-07-10 security-advisories@github.com
XSS PHP Snipe It
6.2
CVSS 4.0 · Vendor: github
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Severity by source

Vendor (github) PRIMARY
6.2 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.4 MEDIUM

PR:L for authenticated low-privilege upload; UI:R for victim opening attachment; S:C and limited C/I reflect same-origin session JavaScript access.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

Primary rating from Vendor (github).

CVSS VectorVendor: github

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
A
Scope
X

Lifecycle Timeline

2
Patch available
Jul 10, 2026 - 21:02 EUVD
Analysis Generated
Jul 10, 2026 - 20:43 vuln.today

DescriptionCVE.org

Snipe-IT is an IT asset/license management system. Prior to 8.6.2, UploadFileRequest sanitizes SVG content only when PHP finfo reports image/svg+xml and UploadedFilesController serves attachments inline without using StorageHelper::allowSafeInline(), allowing a low-privilege user to upload active XHTML or XML content that is later served same-origin and executes JavaScript in a viewer’s browser. This issue is fixed in version 8.6.2.

AnalysisAI

Stored cross-site scripting in Snipe-IT prior to 8.6.2 enables a low-privilege authenticated user to upload malicious XHTML or XML files that bypass the SVG sanitization gate and execute arbitrary JavaScript in any viewer's browser when the attachment is opened inline. The bypass works because UploadFileRequest only sanitizes SVG content when PHP's finfo extension reports image/svg+xml - uploading XHTML or generic XML evades this check - while UploadedFilesController serves the file same-origin without invoking StorageHelper::allowSafeInline(), completing the injection path. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker authenticates with low-privilege Snipe-IT account
Delivery
Crafts XHTML or XML file with embedded JavaScript payload
Exploit
Uploads file as asset attachment, bypassing finfo SVG sanitization gate
Execution
Victim administrator opens attachment inline via UploadedFilesController
Persist
Browser executes JavaScript same-origin in victim's session
Impact
Attacker captures session token or performs privileged CSRF action
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Vulnerability AssessmentAI

Exploitation The attacker must hold a valid Snipe-IT account with file upload permissions - the CVSS PR:L metric confirms authentication at the low-privilege level is required; unauthenticated exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:A/SC:H/SI:H/SA:N) scores 6.2, placing this in the medium band. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a low-privilege Snipe-IT account crafts an XHTML file embedding a JavaScript payload - such as a script that exfiltrates document.cookie to an attacker-controlled endpoint - and uploads it as an attachment to an asset record. When an administrator later opens the attachment inline through the Snipe-IT interface to review it, UploadedFilesController serves the XHTML same-origin without sanitization, the browser executes the embedded script in the administrator's session, and the attacker receives the stolen session token. …
Remediation Upgrade Snipe-IT to version 8.6.2 or later, the vendor-confirmed fix released via commit 000cea0a622d586366cf60d2240c7c2a4b17c955 (https://github.com/grokability/snipe-it/commit/000cea0a622d586366cf60d2240c7c2a4b17c955) and documented in the security advisory GHSA-jhph-5q74-pmfx. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-55466 vulnerability details – vuln.today
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