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PatchSiren cyber security CVE debrief

CVE-2026-55466 grokability CVE debrief

CVE-2026-55466 is a vulnerability in Snipe-IT, an IT asset/license management system. Prior to version 8.6.2, the UploadFileRequest sanitizes SVG content only when PHP finfo reports image/svg+xml. The 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. The vulnerability has a CVSS score of 6.2 and is classified as Medium severity.

Vendor
grokability
Product
snipe-it
CVSS
MEDIUM 6.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-10
Original CVE updated
2026-07-14
Advisory published
2026-07-10
Advisory updated
2026-07-14

Who should care

Users of Snipe-IT versions prior to 8.6.2 should be aware of this vulnerability and take steps to mitigate it. This includes administrators, security teams, and IT personnel responsible for maintaining and securing Snipe-IT installations.

Technical summary

The vulnerability exists in the UploadFileRequest and UploadedFilesController components of Snipe-IT. Specifically, the UploadFileRequest only sanitizes SVG content when PHP finfo reports it as image/svg+xml. Additionally, the UploadedFilesController serves attachments inline without properly validating their content using StorageHelper::allowSafeInline(). This allows a low-privilege user to upload malicious XHTML or XML content that can execute JavaScript in the browser of a user who views the content.

Defensive priority

Medium

Recommended defensive actions

  • Upgrade to Snipe-IT version 8.6.2 or later
  • Restrict upload privileges to trusted users
  • Implement additional validation and sanitization for uploaded content
  • Monitor for suspicious activity and implement compensating controls
  • Review and update incident response plans to address potential exploitation
  • Conduct regular security audits and vulnerability assessments
  • Implement a Web Application Firewall (WAF) to detect and prevent attacks

Evidence notes

The CVE record was published on 2026-07-10T20:16:46.970Z and has not been modified since then. The NVD entry is currently 6.2, Medium. References include commits and releases from the Snipe-IT GitHub repository. The vulnerability was reported by a security researcher who found that the UploadFileRequest sanitizes SVG content only when PHP finfo reports image/svg+xml, and the UploadedFilesController serves attachments inline without using StorageHelper::allowSafeInline().

Sources and references

Verified primary and authoritative sources

  • CVE-2026-55466 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-55466

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-55466 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-55466

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.