CVE-2026-87011

Katalog CVE

CVSS 7.5 · High EPSS 0,64%

Kerentanan Asymmetric Resource Consumption (Amplification) pada openwebui open webui. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, the unauthenticated POST /oauth/backchannel-logout handler in backend/open_webui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout token. Each request repeated uncached network fetches, and the signing-key lookup blocked the async event loop, so requests carrying invalid tokens could stall the single-worker instance and amplify traffic to the identity provider when ENABLE_OAUTH_BACKCHANNEL_LOGOUT was enabled. This issue is fixed in version 0.11.1.

Rincian

Terbit di NVD

9 September 2026

Terakhir diubah

15 September 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-405: Asymmetric Resource Consumption (Amplification)
CWE-770: Allocation of Resources Without Limits or Throttling

EPSS (30 hari)

0,64% peluang dieksploitasi; lebih tinggi dari 49,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/open-webui/open-webui/security/advisories/GHSA-3g9q-v48f-hh9w exploit · advisory vendor
• https://github.com/open-webui/open-webui/commit/aeda6ff13a25d3b3ba1b303609f35382db22142c patch
• https://github.com/open-webui/open-webui/releases/tag/v0.11.1 release notes