https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-09-28T22:57:59.792844+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/brew-mailcatcher-cve-2026-54464 BREW-mailcatcher-CVE-2026-54464 — websocket-driver: Resource limit bypass via message compression 2026-09-28T22:58:01.522125+00:00

Affected: Homebrew: mailcatcher

### 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 size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage.

### Patches

The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version.

### Workarounds

No known workarounds exist.

### Acknowledgements

This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.

 https://vulnerability.circl.lu/vuln/fkie_cve-2026-54464 fkie_cve-2026-54464 2026-09-28T22:58:01.522246+00:00

### 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 size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage.

### Patches

The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version.

### Workarounds

No known workarounds exist.

### Acknowledgements

This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.

 https://vulnerability.circl.lu/vuln/ghsa-33ph-fccm-39pj GHSA-33ph-fccm-39pj — websocket-driver: Resource limit bypass via message compression 2026-09-28T22:58:01.522312+00:00

Affected: RubyGems: websocket-driver

### 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 size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage.

### Patches

The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version.

### Workarounds

No known workarounds exist.

### Acknowledgements

This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.

 https://vulnerability.circl.lu/vuln/oesa-2026-3218 OESA-2026-3218 — rubygem-websocket-driver security update 2026-09-28T22:58:01.522369+00:00

Affected: openEuler:20.03-LTS-SP4: rubygem-websocket-driver, openEuler:22.03-LTS-SP4: rubygem-websocket-driver, openEuler:24.03-LTS-SP1: rubygem-websocket-driver, openEuler:24.03-LTS-SP3: rubygem-websocket-driver, openEuler:24.03-LTS-SP4: rubygem-websocket-driver

This module provides a complete implementation of the WebSocket protocols that can be hooked up to any TCP library. It aims to simplify things by decoupling the protocol details from the I/O layer, such that users only need to implement code to stream data in and out of it without needing to know anything about how the protocol actually works. Think of it as a complete WebSocket system with pluggable I/O. Security Fix(es):

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory. This issue is fixed in version 0.8.1.(CVE-2026-54463)

### 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 size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage.

### Patc…

 https://vulnerability.circl.lu/vuln/ubuntu-cve-2026-54464 UBUNTU-CVE-2026-54464 2026-09-28T22:58:01.522461+00:00

Affected: Ubuntu:16.04:LTS: ruby-websocket-driver, Ubuntu:18.04:LTS: ruby-websocket-driver, Ubuntu:20.04:LTS: ruby-websocket-driver, Ubuntu:22.04:LTS: ruby-websocket-driver, Ubuntu:24.04:LTS: ruby-websocket-driver, Ubuntu:26.04:LTS: ruby-websocket-driver

### 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 size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage. ### Patches The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version. ### Workarounds No known workarounds exist. ### Acknowledgements This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.