CVE-2026-48802 python-engineio has unbound thread allocation that can cause denial of service

python-engineio is a Python implementation of the Engine.IO realtime client and server. Prior to version 4.13.2, an attacker can cause the creation of unnecessary background threads in the python-engineio server by exploiting the heartbeat mechanism, which launches a thread when a new connection ...

CVE-2026-48802 python-engineio has unbound thread allocation that can cause denial of service

python-engineio is a Python implementation of the Engine.IO realtime client and server. Prior to version 4.13.2, an attacker can cause the creation of unnecessary background threads in the python-engineio server by exploiting the heartbeat mechanism, which launches a thread when a new connection ...

CVE-2026-48802

Summary (CVE-2026-48802, python-engineio): Before v4.13.2, a heartbeat-driven background thread could be created on new connections or PONG handling, causing DoS especially on synchronous servers. The fix in v4.13.2 changes the behavior so that the initial heartbeat background thread/async task i...

aibro (>=0.5.5, <=1.1.5), aioambient (>=0.1.1, <=1.2.2) +231 more potentially affected by CVE-2026-48802 via python-engineio (>=3.2.2, <=4.13.1)

python-engineio PYPI version =3.2.2, =0.5.5, =0.1.1, =0.1.1, =4.0.6, =0.16.0, =2.3.0, =1.0.5, =0.9.0, =0.0.3, =4.0.2, =4.0.0.8, =0.1.0, =0.1.5 - baseweb 0.0.5 and more Source cves: CVE-2026-48802 Source advisory: MEND:CVE-2026-48802...

CVE-2026-48802

python-engineio is a Python implementation of the Engine.IO realtime client and server. Prior to version 4.13.2, an attacker can cause the creation of unnecessary background threads in the python-engineio server by exploiting the heartbeat mechanism, which launches a thread when a new connection ...

CVE-2026-48802

python-engineio is a Python implementation of the Engine.IO realtime client and server. Prior to version 4.13.2, an attacker can cause the creation of unnecessary background threads in the python-engineio server by exploiting the heartbeat mechanism, which launches a thread when a new connection ...

CVE-2026-48802 python-engineio has unbound thread allocation that can cause denial of service

python-engineio is a Python implementation of the Engine.IO realtime client and server. Prior to version 4.13.2, an attacker can cause the creation of unnecessary background threads in the python-engineio server by exploiting the heartbeat mechanism, which launches a thread when a new connection ...

CVE-2026-48802

python-engineio is a Python implementation of the Engine.IO realtime client and server. Prior to version 4.13.2, an attacker can cause the creation of unnecessary background threads in the python-engineio server by exploiting the heartbeat mechanism, which launches a thread when a new connection ...

CVE-2026-48809

CVE-2026-48809 – python-engineio : The issue affects the python-engineio server prior to version 4.13.2, where the size of incoming messages could be loaded into memory before validation, enabling potential DoS through excessive memory allocation. Two configurations are affected: POST requests wi...

CVE-2026-48809

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

EUVD-2026-56854

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

aibro (>=0.5.5, <=1.1.5), aioambient (>=0.1.1, <=1.2.2) +231 more potentially affected by CVE-2026-48809 via python-engineio (>=3.2.2, <=4.13.1)

python-engineio PYPI version =3.2.2, =0.5.5, =0.1.1, =0.1.1, =4.0.6, =0.16.0, =2.3.0, =1.0.5, =0.9.0, =0.0.3, =4.0.2, =4.0.0.8, =0.1.0, =0.1.5 - baseweb 0.0.5 and more Source cves: CVE-2026-48809 Source advisory: MEND:CVE-2026-48809...

CVE-2026-48809 python-engineio has possible denial of service due to maximum payload size sometimes not being enforced

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

CVE-2026-48809

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

CVE-2026-48809 python-engineio has possible denial of service due to maximum payload size sometimes not being enforced

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

CVE-2026-48809 python-engineio has possible denial of service due to maximum payload size sometimes not being enforced

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

CVE-2026-48809

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take...

CVE-2026-73217

Cursor is a code editor built for programming with AI. Prior to 3.1.2, Cursor IDE for macOS allows an agent running in Auto-Run Sandbox mode to replace a virtual environment's Python executable with a malicious wrapper that the Microsoft Python extension invokes outside the sandbox, allowing...

CVE-2026-73217

The CVE describes a sandbox-escape flaw in Cursor IDE for macOS prior to 3.1.2. An agent in Auto-Run Sandbox mode can replace a virtual environment’s Python executable with a malicious wrapper that the Microsoft Python extension invokes outside the sandbox, enabling arbitrary host commands with t...

CVE-2026-73217 Cursor: Sandbox escape via tampered Python virtual environments

Cursor is a code editor built for programming with AI. Prior to 3.1.2, Cursor IDE for macOS allows an agent running in Auto-Run Sandbox mode to replace a virtual environment's Python executable with a malicious wrapper that the Microsoft Python extension invokes outside the sandbox, allowing...