urllib3: urllib3: Denial of Service due to excessive HTTP response decompression

A flaw was found in urllib3, an HTTP client library for Python. This vulnerability allows a remote attacker to cause excessive resource consumption, such as high CPU usage and massive memory allocation, on the client side. This occurs when urllib3 attempts to decompress an entire HTTP response,...

RHEL 8 : python3.11 (RHSA-2026:26187)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26187 advisory. Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level...

The vulnerability of PDF viewing and editing programs such as Adobe Acrobat, Adobe Acrobat Reader, and Adobe Acrobat 2024 lies in their ability to exploit memory after it is freed, allowing an attacker to execute arbitrary code.

The vulnerability of PDF viewing and editing programs such as Adobe Acrobat, Adobe Acrobat Reader, and Adobe Acrobat 2024 relates to the ability to utilize memory after decompression. Exploiting this vulnerability can allow an attacker to execute arbitrary code by opening the malicious file...

EulerOS Virtualization 2.13.0 : python-pip (EulerOS-SA-2026-2183)

According to the versions of the python-pip package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : Requests is a HTTP library. Prior to 2.32.0, when making requests through a Requests Session, if the first request is made with...

ALSA-2026:19064 Important: python3.12 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...

Important: Red Hat Security Advisory: python3 security update

An update for python3 is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Red Hat Product Security has rated this update as...

Security Bulletin: IBM Automation Decision Services for April 2026- Multiple CVEs addressed

Summary In addition to many updates of operating system level packages, the following security vulnerabilities are addressed with IBM Automation Decision Services. See full list below. Vulnerability Details CVEID:CVE-2025-12183 DESCRIPTION: Out-of-bounds memory operations in org.lz4:lz4-java 1.8....

Multiple Cisco Products Snort 3 VBA Decompression DoS (cisco-sa-ftd-snort3-vbavuls-96UcVVed)

According to its self-reported version, Cisco Secure Firewall Threat Defense FTD Software is affected by multiple vulnerabilities. - Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detecti...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

EUVD-2026-20779

Unfurl before 2026.04 contains an unbounded zlib decompression vulnerability in parsecompressed.py that allows remote attackers to cause denial of service. Attackers can submit highly compressed payloads via URL parameters to the /json/visjs endpoint that expand to gigabytes, exhausting server...

CVE-2026-2575

Keycloak vulnerability CVE-2026-2575 allows an unauthenticated attacker to trigger an application‑level DoS by sending a highly compressed SAMLRequest via the Redirect Binding. The server does not enforce size limits during DEFLATE decompression, causing an OutOfMemoryError and possible process t...

Decompressing invalid data can leak information from uninitialized memory or reused output buffer

Decompressing invalid LZ4 data with the block API can leak data from uninitialized memory, or leak content from previous decompression operations when reusing an output buffer. The LZ4 block format defines a "match copy operation" which duplicates previously written data or data from a...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...