CVE-2026-55464: Snipe/snipe it Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-r52f-r9v5-66xr
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2026-55464 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Snipe/snipe it libraries in the Packagist ecosystem. The issue involves snipe-it vulnerable to stored xss via markdown custom field. Remediation is available by upgrading affected packages to version 8.6.2.

CVE-2026-55464 at a Glance

CVE Identifier CVE-2026-55464
GHSA Identifier GHSA-r52f-r9v5-66xr
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Snipe/snipe it
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-55464

To remediate this vulnerability, upgrade all affected Snipe/snipe it dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

snipe/snipe-it fixed: 8.6.2 
Upgrade snipe/snipe-it to 8.6.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for snipe/snipe-it

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-55464, inspect your project dependencies for Snipe/snipe it:

inspect dependencies for snipe/snipe-it

Analyze the terminal output to locate any version of Snipe/snipe it in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.6.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Snipe/snipe it, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact CommonMark is configured with `html_input => 'escape'`, which blocks raw HTML injection. However, javascript: URIs in Markdown hyperlinks are not sanitized. A user with `assets.edit` permission can inject a malicious link into any markdown-textarea custom field. Any user who opens the asset detail page and clicks the link executes arbitrary JavaScript in their browser session.

CVE-2026-55464 Affected Snipe/snipe it Versions

1 component(s)
Fixed Versions:
8.6.2
Product / Package Ecosystem Affected Versions Fixed Version
snipe/snipe-it
 Packagist
< 8.6.2
8.6.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/grokability/snipe-it/security/advisories/GHSA-r52f-r9v5-66xr
NVD — CVE-2026-55464 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55464
Security Fix Commit FIX COMMIT
https://github.com/grokability/snipe-it/commit/006981cccffce1739e24d3b680b676f772f40e2d
Snipe/snipe it Source Repository REPOSITORY
https://github.com/grokability/snipe-it
Snipe/snipe it Release RELEASE
https://github.com/grokability/snipe-it/releases/tag/v8.6.2

Frequently Asked Questions

What is CVE-2026-55464?
CVE-2026-55464 is a security vulnerability in Snipe/snipe it involving Snipe-IT vulnerable to stored XSS via Markdown custom field under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Snipe/snipe it versions are affected?
Affected versions include releases prior to 8.6.2 across affected packages: snipe/snipe-it.
What version fixes CVE-2026-55464?
Upgrading to 8.6.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is snipe/snipe-it affected?
Yes, snipe/snipe-it is affected in releases prior to 8.6.2. Upgrade your dependency to 8.6.2 or later.
What is the CVSS score of CVE-2026-55464?
CVE-2026-55464 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-55464?
CVE-2026-55464 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2026-55464?
Run the dependency tree command: 'inspect dependencies for snipe/snipe-it'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-r52f-r9v5-66xr",
  "modified" : "2026-08-28T17:58:55Z",
  "published" : "2026-08-28T17:58:55Z",
  "aliases" : [ "CVE-2026-55464" ],
  "summary" : "Snipe-IT vulnerable to stored XSS via Markdown custom field ",
  "details" : "### Impact\nCommonMark is configured with `html_input => 'escape'`, which blocks raw HTML injection. However, javascript: URIs in Markdown hyperlinks are not sanitized. A user with `assets.edit` permission can inject a malicious link into any markdown-textarea custom field. Any user who opens the asset detail page and clicks the link executes arbitrary JavaScript in their browser session.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "snipe/snipe-it"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.6.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/grokability/snipe-it/security/advisories/GHSA-r52f-r9v5-66xr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-55464"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/grokability/snipe-it/commit/006981cccffce1739e24d3b680b676f772f40e2d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/grokability/snipe-it"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/grokability/snipe-it/releases/tag/v8.6.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-28T17:58:55Z",
    "nvd_published_at" : "2026-07-10T19:17:24Z"
  }
}