# CVE-2026-3673: CVE-2026-3673

Status: published. Published: 2026-04-22. Updated: 2026-11-11.

An authenticated attacker can store a crafted tag value in _user_tags and trigger JavaScript execution when a victim opens the list/report view where tags are rendered. The vulnerable renderer interpolates tag content into HTML attributes and element content without escaping.
This issue affects Frappe: 16.10.10.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- frappe / frappe: 16.10.10 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:frappe:frappe:16.10.10:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 4.0: 4.6 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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; source: NVD: help@fluidattacks.com

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: NVD: nvd@nist.gov

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://fluidattacks.com/es/advisories/silvio (help@fluidattacks.com)
- exploit: https://fluidattacks.com/es/advisories/silvio (134c704f-9b21-4f2e-91b3-4a467353bcc0)

## References

- https://fluidattacks.com/es/advisories/silvio (help@fluidattacks.com; Exploit, Third Party Advisory)

- https://github.com/frappe/frappe (help@fluidattacks.com; Product)

- https://fluidattacks.com/es/advisories/silvio (134c704f-9b21-4f2e-91b3-4a467353bcc0; Exploit, Third Party Advisory)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3673; retrieved 2026-11-12; source updated 2026-11-11

Revision: c6cddf3b573f52c91579288649f6c75815a394f1478cf39e9c726395f72116ee

Canonical: https://y2.dev/cve/CVE-2026-3673

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.