FastChat Server-Side Request Forgery vulnerability

A Server-Side Request Forgery SSRF vulnerability exists in lm-sys/fastchat version 0.2.36. The vulnerability is present in the /queue/join? endpoint, where insufficient validation of the path parameter allows an attacker to send crafted requests. This can lead to unauthorized access to internal...

PYSEC-2026-1398 FastChat Uncontrolled Resource Consumption vulnerability

In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of multipart boundaries. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary. Each extra character is processed in an infinit...

FastChat open redirect vulnerability

An open redirect vulnerability in lm-sys/fastchat Release v0.2.36 allows a remote unauthenticated attacker to redirect users to arbitrary websites via a specially crafted URL. This can be exploited for phishing attacks, malware distribution, and credential theft...

PYSEC-2026-1397 FastChat Server-Side Request Forgery vulnerability

A Server-Side Request Forgery SSRF vulnerability exists in lm-sys/fastchat version 0.2.36. The vulnerability is present in the /queue/join? endpoint, where insufficient validation of the path parameter allows an attacker to send crafted requests. This can lead to unauthorized access to internal...

CVE-2026-6607

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be...

CVE-2026-6608

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

EUVD-2026-23778

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be...

EUVD-2026-23780

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

GHSA-F3Q6-69F3-VWCH FastChat has a Content Moderation Bypass via Arena Side-by-Side Views

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

FastChat has a Content Moderation Bypass via Arena Side-by-Side Views

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

GHSA-5H65-JX66-J7P5 FastChat has Denial of Service Through Blocking Event Loop in Model Workers (Incomplete Fix for ff66426)

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be...

CVE-2026-6608

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

CVE-2026-6607

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be...

CVE-2026-6608 lm-sys fastchat Arena Side-by-Side View add_text control flow

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

CVE-2026-6608

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

CVE-2026-6608

The CVE-2026-6608 issue affects lm-sys fastchat prior to 0.2.36, specifically the Arena Side-by-Side View Handler’s add_text function. The vulnerability enables an attacker to manipulate control flow and can be exploited remotely; public exploit details exist. The root cause was addressed in comm...

CVE-2026-6608 lm-sys fastchat Arena Side-by-Side View add_text control flow

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

CVE-2026-6608 lm-sys fastchat Arena Side-by-Side View add_text control flow

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function addtext of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was...

CVE-2026-6607 lm-sys fastchat Worker API Endpoint api_generate resource consumption

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be...

CVE-2026-6607

CVE-2026-6607 affects lm-sys FastChat up to version 0.2.36, specifically the Worker API Endpoint function api_generate. The issue allows remote manipulation leading to resource consumption; CVE details indicate a publicly disclosed exploit and a patch is available (patch id c9e84b89c91d45191dc244...