CVE-2026-15709

The CVE concerns libsoup's WebSocket permessage-deflate implementation. The decompression loop (inflate()) can allocate memory without an upper bound, as output size is not bounded during decompression even though max_incoming_payload_size limits input frames. A separate check for decompressed si...

CVE-2026-15709

A flaw was found in libsoup's WebSocket implementation when using the permessage-deflate extension. The extension's decompression loop inflate processes data in chunks without enforcing an upper boundary limit on the output buffer size. While libsoup limits the incoming compressed frame size via...

CVE-2026-15709 Soupwebsocketextensiondeflate: libsoup: libsoup: websocket permessage-deflate unbounded decompression remote denial of service

A flaw was found in libsoup's WebSocket implementation when using the permessage-deflate extension. The extension's decompression loop inflate processes data in chunks without enforcing an upper boundary limit on the output buffer size. While libsoup limits the incoming compressed frame size via...

CVE-2026-15709

A flaw was found in libsoup's WebSocket implementation when using the permessage-deflate extension. The extension's decompression loop inflate processes data in chunks without enforcing an upper boundary limit on the output buffer size. While libsoup limits the incoming compressed frame size via...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification via the inflate process. An attacker can cause unbounded memory allocation leading to application or service crashes by sending specially crafted, highly compressed WebSocke...

PT-2026-58722

Name of the Vulnerable Software and Affected Versions libsoup affected versions not specified Description A flaw exists in the WebSocket implementation when utilizing the permessage-deflate extension. The decompression loop inflate processes data in chunks but does not enforce an upper boundary...

CVE-2026-15709: Improper Handling of Highly Compressed Data (Data Amplification)

A flaw was found in libsoup's WebSocket implementation when using the permessage-deflate extension. The extension's decompression loop inflate processes data in chunks without enforcing an upper boundary limit on the output buffer size. While libsoup limits the incoming compressed frame size via...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the permessage-deflate extension. An attacker can cause the application to process messages that exceed the intended resource limits by sending compressed messages that, when...

Resource limit bypass via message compression

Impact If this library is used in tandem with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size. This is because this limit is checked against the message frames' length headers, which give the si...

CVE-2026-39804

A flaw was found in bandit. An unauthenticated attacker who can open a WebSocket connection can exploit a vulnerability when WebSocket permessage-deflate compression is enabled. This flaw allows for memory exhaustion by sending a highly compressed frame that, when decompressed, forces large memor...

EUVD-2026-26711

Bandit's unbounded WebSocket inflate causes BEAM OOM with a single frame...

GHSA-FRH3-6PV6-RC8J Bandit's unbounded WebSocket inflate causes BEAM OOM with a single frame

Summary When a Bandit-fronted server has explicitly enabled WebSocket permessage-deflate compress: true, an unauthenticated client can OOM the BEAM with a single 6 MiB WebSocket frame. Bandit's inflate step has no output-size cap, so a small high-ratio compressed frame e.g. zeros, 1024:1 ratio...

Bandit's unbounded WebSocket inflate causes BEAM OOM with a single frame

Summary When a Bandit-fronted server has explicitly enabled WebSocket permessage-deflate compress: true, an unauthenticated client can OOM the BEAM with a single 6 MiB WebSocket frame. Bandit's inflate step has no output-size cap, so a small high-ratio compressed frame e.g. zeros, 1024:1 ratio...

CVE-2026-39804

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804 WebSocket permessage-deflate inflate has no output-size cap in bandit

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804 WebSocket permessage-deflate inflate has no output-size cap in bandit

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

EEF-CVE-2026-39804 WebSocket permessage-deflate inflate has no output-size cap in bandit

Summary Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804

The vulnerability CVE-2026-39804 affects Bandit (Elixir) WebSocket permessage-deflate handling. The function Elixir.Bandit.WebSocket.PerMessageDeflate.inflate/2 calls :zlib.inflate/2 without an output size cap and materializes the full decompressed payload into a single binary, while max_frame_si...

CVE-2026-39804: Allocation of Resources Without Limits or Throttling

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...