# CVE-2026-117477: CVE-2026-117477

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

KUSANAGI provided by GMO Prime Strategy Co., Ltd. contains an HTTP header injection vulnerability that may allow arbitrary HTTP headers to be injected into the HTTP response when a user accesses a specially crafted URL.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- GMO Prime Strategy Co., Ltd. / KUSANAGI 7 Security Edition: ≥ 0; ≤ 10.7.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 7 Enterprise Edition: ≥ 0; ≤ 10.7.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 8 Security Edition: ≥ 0; ≤ 10.7.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 8 Enterprise Edition: ≥ 0; ≤ 10.7.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 9 Security Edition: ≥ 0; ≤ 10.7.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 9 Enterprise Edition: ≥ 0; ≤ 10.7.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 7 Free Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 7 Business Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 7 Premium Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 8 Free Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 8 Business Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 8 Premium Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 9 Free Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 9 Business Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert
- GMO Prime Strategy Co., Ltd. / KUSANAGI 9 Premium Edition: ≥ 0; ≤ 9.12.2-1 (affected, semver). Source: CNA: jpcert

## Severity and prioritization

- 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: jpcert

- CVSS 4.0: 5.1 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N; source: CNA: jpcert

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-113

## Exploit evidence

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

## References

- https://kusanagi.tokyo/en/releases/27995/ (CNA: jpcert)

- https://jvn.jp/en/vu/JVNVU92635551/ (CNA: jpcert)

## Provenance

- CNA: jpcert: https://www.cve.org/CVERecord?id=CVE-2026-117477; retrieved 2026-11-10; source updated 2026-11-09

Revision: 0d1160e236b97226e65ce7d33d0e9775fafb92ed20aee9e710d4ccf4ff3bc378

Canonical: https://y2.dev/cve/CVE-2026-117477

## Agent and API access

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- 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.