CVE-2026-42261

Katalog CVE

CVSS 7.1 · High EPSS 0,34%

Kerentanan Improper Input Validation pada legeling prompthub. Skor CVSS 3.1 7.1 (High) menurut github.com.

Deskripsi (NVD)

PromptHub is an all-in-one AI toolbox for prompt, skill, and agent management. From version 0.4.9 to before version 0.5.4, apps/web/src/routes/skills.ts exposes an authenticated endpoint POST /api/skills/fetch-remote that fetches a user-supplied URL server-side and reflects the response body (up to 5 MB) back to the caller. The SSRF protection in apps/web/src/utils/remote-http.ts (isPrivateIPv6) attempts to block private/loopback destinations, but multiple alternate-but-valid IPv6 representations bypass the check. The bypasses reach any IPv4 address (loopback, RFC1918, link-local) via IPv4-mapped IPv6 in hex form, and the canonical ::1 via any representation that isn't the literal string "::1". Any authenticated user (role: user or admin) can trigger the SSRF. On deployments configured with ALLOW_REGISTRATION=true — a supported and documented configuration — this means any internet user who can register. This issue has been patched in version 0.5.4.

Rincian

Terbit di NVD

8 Mei 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

7.1 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation
CWE-693: Protection Mechanism Failure
CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

0,34% peluang dieksploitasi; lebih tinggi dari 25,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/legeling/PromptHub/security/advisories/GHSA-9fhh-fjfg-5mr6 exploit · mitigasi · advisory vendor
• https://github.com/legeling/PromptHub/releases/tag/v0.5.4 patch · product