PYSEC-2026-4117 Open WebUI: Unauthenticated requests can stall the server via uncached OIDC fetches in back-channel logout

Summary The OIDC back-channel logout endpoint is unauthenticated by design, because the identity provider calls it without a browser session. Before checking whether the submitted logout token was genuine, the handler fetched the provider's discovery document and its signing keys over the network...

PT-2026-105866

Summary The OIDC back-channel logout endpoint is unauthenticated by design, because the identity provider calls it without a browser session. Before checking whether the submitted logout token was genuine, the handler fetched the provider's discovery document and its signing keys over the network...

CVE-2026-87011

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/openwebui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout...

CVE-2026-87011

Open WebUI , a self-hosted AI platform, contains a denial-of-service vulnerability in the unauthenticated POST /oauth/backchannel-logout handler (backend/open_webui/utils/oauth.py). From version 0.9.0 through 0.11.1 , the handler fetched the OIDC discovery document and signing keys before validat...

CVE-2026-87011 Open WebUI: Unauthenticated requests can stall the server via uncached OIDC fetches in back-channel logout

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/openwebui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout...

CVE-2026-87011: Asymmetric Resource Consumption (Amplification)

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/openwebui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-099989)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099989 advisory. In the Linux kernel, the following vulnerability has been resolved: nvmet: avoid recursive nvmet-wq flush in nvmetctrlfree nvmettcpreleasequeuework runs on nvmet-wq...

PYSEC-2026-3596 Open WebUI: ReDoS in skill-mention regexes causes whole-instance DoS on default config

Summary Two regexes in backend/openwebui/utils/middleware.py that parse skill-mention tags backtrack in On² on input that contains . Both run synchronously, on the asyncio event loop, on every chat completion with no feature gate. Because the default deployment is a single uvicorn worker, one suc...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: nvmet: moving async event work off nvmet-wq For the target function nvmetctrlfree, the variable ctrl-asynceventwork is flushed. If nvmetctrlfree runs on nvmet-wq, the flush re-enters the workqueue completion for the same worker. ...

AZL-83630 CVE-2026-31557 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

DEBIAN-CVE-2026-31557

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

CVE-2026-31557

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

CVE-2026-31557

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

CVE-2026-31557

Summary of CVE-2026-31557 (Linux kernel) : The issue affects the NVMe over Fabrics target (nvmet/nvmet_rdma) where flushing an asynchronous-event work item on nvmet-wq can recurse the same worker, risking a deadlock and DoS. The root cause is a potential re-entrant lock when nvmet_ctrl_free() flu...

CVE-2026-31557

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

CVE-2026-31557 nvmet: move async event work off nvmet-wq

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

EUVD-2026-25450

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

CVE-2026-31557

In the Linux kernel, the following vulnerability has been resolved: nvmet: move async event work off nvmet-wq For target nvmetctrlfree flushes ctrl-asynceventwork. If nvmetctrlfree runs on nvmet-wq, the flush re-enters workqueue completion for the same worker:- A. Async event work queued on...

PT-2026-34909

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A recursive locking issue exists in the nvmet component. When the nvmet ctrl free function flushes ctrl-async event work while running on the nvmet-wq workqueue, it causes the flush to...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the use of the nvmetctrlfree function to refresh asynceventwork on the nvmet-wq layer. This...