h2o -- HTTP/2 state amplification denial of service

h2o project reports: An HTTP/2 attack can combine HPACK decompression state amplification with stalled streams. Depending on server configuration, decoded header state can be retained by stalled streams, causing excessive memory use and denial of service...

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...

New HTTP/2 Bomb Vulnerability Allows Remote DoS on NGINX, Apache, IIS, Envoy & Cloudflare

Cybersecurity researchers have discovered a remote denial-of-service exploit that affects major web servers, including NGINX, Apache HTTPD, Microsoft IIS, Envoy, and Cloudflare Pingora. The vulnerability has been codenamed HTTP/2 Bomb by Calif. "The vulnerable behavior exists in each server's...

PT-2026-46115

Name of the Vulnerable Software and Affected Versions quic-go affected versions not specified Description An attacker can trigger excessive memory allocation in the HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame. This frame decodes into a large trailer field...

Dimensionality Reduction for Cyberattack Classification: A Comparative Evaluation of PCA and Linear Predictive Coding

High-dimensional feature representations are widely used in machine learning-based cyberattack detection systems. However, they increase computational complexity and may hinder deployment in resource-constrained environments. In this paper, we investigate feature compression techniques for...

CVE-2026-48594

Improper Handling of Highly Compressed Data Data Amplification vulnerability in elixir-tesla tesla allows a denial of service via decompression bomb in HTTP response bodies. When Tesla.Middleware.DecompressResponse or Tesla.Middleware.Compression is included in a Tesla middleware pipeline, HTTP...

CVE-2026-48594 Decompression bomb in Tesla.Middleware.DecompressResponse and Tesla.Middleware.Compression

Improper Handling of Highly Compressed Data Data Amplification vulnerability in elixir-tesla tesla allows a denial of service via decompression bomb in HTTP response bodies. When Tesla.Middleware.DecompressResponse or Tesla.Middleware.Compression is included in a Tesla middleware pipeline, HTTP...

CVE-2026-48594

The CVE-2026-48594 issue affects elixir-tesla/tesla: when Tesla.Middleware.DecompressResponse or Tesla.Middleware.Compression is used, HTTP responses are decompressed eagerly without a size cap. The decompress_body/2 path passes the full body to :zlib.gunzip/1 or :zlib.unzip/1, and compression_al...

OPENSUSE-SU-2026:20889-1 Security update for tor

This update for tor fixes the following issues: Changes in tor: - Update to 0.4.9.9 Major bugfixes compression, security: - Fix a compression bomb bypass where an attacker could concatenate many gzip or zlib sub-streams, each just under the per-stream detection threshold, to avoid the compression...

PT-2026-45837

Name of the Vulnerable Software and Affected Versions tesla versions 0.6.0 through 1.18.2 Description Improper handling of highly compressed data allows a denial of service via a decompression bomb in HTTP response bodies. When Tesla.Middleware.DecompressResponse or Tesla.Middleware.Compression i...

CVE-2026-9759

A flaw was found in the ROHC dissector in Wireshark. This issue occurs when malformed packets are decoded from a pcap file or the network, causing a NULL pointer dereference, resulting in a denial of service. Mitigation If the ROHC protocol dissector is not being used, it can be disabled via the...

Security Bulletin:Improper Handling of Highly Compressed Data (Compression Bomb) vulnerability in Erlang OTP

Summary Improper Handling of Highly Compressed Data Compression Bomb vulnerability in Erlang OTP ssh sshtransport modules allows Denial of Service via Resource Depletion. The SSH transport layer advertises legacy zlib compression by default and inflates attacker-controlled payloads...

CVE-2026-10221

A vulnerability was identified in NousResearch hermes-agent up to 0.12.0. Affected by this vulnerability is the function compresscontext of the file runagent.py. The manipulation leads to injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be use...

SUSE CVE-2026-44390

NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability when handling replies with very large RRsets that Unbound needs to perform name compression for. Malicious upstream responses with very large RRsets with records that don't share a suffix above the root can cause Unbound to...

GHSA-9PGC-3CCV-5297 zeroconf has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service

Impact DNSIncoming.decodelabelsatoffset recurses once per DNS-name compression pointer RFC 1035 §4.1.4. Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single 3 kB mDNS packet carrying 1500 chained pointers drives the recursion past CPython'...

zeroconf has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service

Impact DNSIncoming.decodelabelsatoffset recurses once per DNS-name compression pointer RFC 1035 §4.1.4. Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single 3 kB mDNS packet carrying 1500 chained pointers drives the recursion past CPython'...

russh: Post-decompression SSH packet size was not bounded, allowing remote oversized compressed packets

Summary When SSH compression is enabled, russh accepted compressed packets whose on-wire size passed the normal transport packet-length checks but whose decompressed size was much larger. This allowed a remote peer to send oversized post-decompression packets that should have been rejected. In...

GHSA-WWX6-X28X-8259 russh: Post-decompression SSH packet size was not bounded, allowing remote oversized compressed packets

Summary When SSH compression is enabled, russh accepted compressed packets whose on-wire size passed the normal transport packet-length checks but whose decompressed size was much larger. This allowed a remote peer to send oversized post-decompression packets that should have been rejected. In...

CVE-2026-46599

The TIFF decoder does not place a limit on the size of PackBits-compressed data. A maliciously-crafted image can exploit this to cause a small image both in terms of pixel width/height and encoded size to make the decoder decode large amounts of compressed data...

CVE-2026-48962

A flaw was found in perl-IO-Compress, a component used for data compression and decompression. A remote attacker could exploit this vulnerability by crafting a malicious input, specifically an output glob, that bypasses the intended security measures. This could lead to the execution of...