# CVE-2026-127092: BuildAdmin 1.0.1 through 2.3.9 Stored XSS via X-Rewrite-URL in Admin Log

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

BuildAdmin 1.0.1 through 2.3.9 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to store javascript: URLs in the admin operation log via the X-Rewrite-URL header. When an administrator clicks the log entry's url open button, the script runs in the backend origin and steals the adminInfo token from localStorage, enabling account takeover.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- build-admin / BuildAdmin (build-admin/BuildAdmin): ≥ 1.0.1; ≤ 2.3.9 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 6.1 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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: 6.1 (medium); CVSS:3.1/AV:N/AC:L/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: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/build-admin/BuildAdmin/issues/70 (CNA: VulnCheck; issue-tracking)

- https://vul.yulun.ac.cn/20261112/buildadmin/ (CNA: VulnCheck; third-party-advisory)

- https://github.com/build-admin/BuildAdmin/blob/v2.3.9/app/admin/model/AdminLog.php#L145-L153 (CNA: VulnCheck; technical-description)

- https://github.com/build-admin/BuildAdmin/blob/v2.3.9/web/src/components/table/fieldRender/url.vue#L32-L38 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/buildadmin-1.0.1-through-2.3.9-stored-xss-via-x-rewrite-url-in-admin-log (CNA: VulnCheck; third-party-advisory)

- https://github.com/build-admin/BuildAdmin/blob/v2.3.9/app/admin/model/AdminLog.php#L145-L153 (disclosure@vulncheck.com)

- https://github.com/build-admin/BuildAdmin/blob/v2.3.9/web/src/components/table/fieldRender/url.vue#L32-L38 (disclosure@vulncheck.com)

- https://github.com/build-admin/BuildAdmin/issues/70 (disclosure@vulncheck.com)

- https://vul.yulun.ac.cn/20261112/buildadmin/ (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/buildadmin-1.0.1-through-2.3.9-stored-xss-via-x-rewrite-url-in-admin-log (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-127092; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-127092; retrieved 2026-11-13; source updated 2026-11-13

Revision: eb487ecfe692f77455de9781d441a3d80994e8b94b336481cabde20fbf06751f

Canonical: https://y2.dev/cve/CVE-2026-127092

## 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.