# CVE-2026-126798: NextScan 1.1.0 through 1.2.0 Stored XSS via URL Asset Detail View

Status: published. Published: 2026-11-11. Updated: 2026-11-13.

NextScan 1.1.0 through 1.2.0 contains a stored cross-site scripting vulnerability in the ns-admin URL asset detail dialog that renders crawled form request bodies (Asset_URL.data) via innerHTML without encoding. Attackers can host crafted forms on crawled sites to store JavaScript that executes when users view asset details, stealing localStorage access tokens to hijack sessions, including administrators.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- tongcheng-security-team / NextScan (lysec/ns-admin): ≥ 1.1.0; ≤ 1.2.0 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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: disclosure@vulncheck.com

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.24% as of 2026-11-13; percentile 15.39%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://vul.yulun.ac.cn/20261107/nextscan/ (ADP: CISA-ADP)

## References

- https://github.com/tongcheng-security-team/NextScan/issues/49 (CNA: VulnCheck; issue-tracking)

- https://hub.docker.com/r/lysec/ns-admin (CNA: VulnCheck; product)

- https://vul.yulun.ac.cn/20261107/nextscan/ (CNA: VulnCheck; third-party-advisory)

- https://www.vulncheck.com/advisories/nextscan-1.1.0-through-1.2.0-stored-xss-via-url-asset-detail-view (CNA: VulnCheck; third-party-advisory)

- https://vul.yulun.ac.cn/20261107/nextscan/ (ADP: CISA-ADP; exploit)

- https://github.com/tongcheng-security-team/NextScan/issues/49 (disclosure@vulncheck.com)

- https://hub.docker.com/r/lysec/ns-admin (disclosure@vulncheck.com)

- https://vul.yulun.ac.cn/20261107/nextscan/ (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/nextscan-1.1.0-through-1.2.0-stored-xss-via-url-asset-detail-view (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-126798; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126798; retrieved 2026-11-13; source updated 2026-11-12

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-126798; retrieved 2026-11-13; source updated Not reported

Revision: 370a29b54697cb9c9a1c60d4f33605bcc365afd98eda06c026cbbf188a013278

Canonical: https://y2.dev/cve/CVE-2026-126798

## 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.