📄 HTTP.sys HTTP/2 Denial of Service

This advisory provides simple proof of concept details to trigger the HTTP/2 denial of service condition related to malformed Accept-Encoding headers. Titles: CVE-2026-49160 - HTTP.sys HTTP/2 Denial of Service DoS Vulnerability Author: nu11secur1ty Date: 06/24/2026 Vendor: Microsoft Corporation...

K000161850: urllib3 vulnerability CVE-2025-66471

Security Advisory Description urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Streaming API improperly handles highly compressed data. urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading the...

Important: rclone

Issue Overview: Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service. CVE-2026-25680 Affected Packages: rclone Note: This advisory is applicable to Amazon Linux 2 AL2 Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras...

Medium: golang

Issue Overview: x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically bas...

Medium: golist

Issue Overview: x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically bas...

Security Bulletin: IBM Verify Identity Protection Self-Hosted is affected by multiple vulnerabilities

Summary Security Vulnerabilities were addressed in IBM Verify Identity Protection Self-Hosted Vulnerability Details CVEID:CVE-2025-66418 DESCRIPTION: urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression...

PT-2026-51098

Name of the Vulnerable Software and Affected Versions py7zr versions prior to 1.1.3 Description A denial of service issue exists where a crafted .7z archive with a large numstreams value causes excessive CPU consumption. This occurs because the PackInfo. read function in archiveinfo.py uses an On...

CVE-2026-48988

markdown-it is a Markdown parser. Versions 14.1.1 and below contain a denial-of-service vulnerability when typographer: true is enabled, due to quadratic On^2 processing in the smartquotes rule. The issue stems from repeatedly modifying strings with replaceAt, which performs On slicing and...

CVE-2026-54417

An integer overflow in the mtarnext function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service uncontrolled CPU consumption / infinite loop via a crafted tar archive. mtarnext computes the offset to the next record as rounduph.size, 512 +...

389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS)

A flaw was found in 389-ds-base. The getldapmessagecontrolsext function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls...

Inefficient Algorithmic Complexity

Overview markdown-it is a modern pluggable markdown parser. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the replaceAt function in the smartquotes rule when processing markdown input with a large number of consecutive quotation marks and the...

PT-2026-49583

Name of the Vulnerable Software and Affected Versions Angular versions prior to 22.0.1 Angular versions prior to 21.2.17 Angular versions prior to 20.3.25 Description A Denial of Service DoS issue exists in the @angular/common package. The formatDate function, also used by the standard DatePipe,...

File Browser has a DoS Vulnerability via Public Login API

Summary Unchecked passwords maximums allow for an arbitrarily large password to be passed into the login API. This spikes CPU and memory, and after testing, crashes, heavily lags any container created, and has even made my docker daemon start to send errors with status code 500 even after the...

Important: Red Hat Security Advisory: podman security update

An update for podman is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

CLEANSTART-2026-SQ76279 Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU

Multiple security vulnerabilities affect the dex package. Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU. See references for individual vulnerability details...

CLEANSTART-2026-UE70720 Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU

Security vulnerability affects the mongodb package. Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU...

CVE-2026-49955 Hermes WebUI < 0.51.270 Resource Exhaustion via passkey/options

Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade service availability by repeatedly calling the passkey options endpoint without completing assertion. Attackers can send unlimited POST requests to the...

PT-2026-47853

Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade service availability by repeatedly calling the passkey options endpoint without completing assertion. Attackers can send unlimited POST requests to the...

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,...

EulerOS Virtualization 2.10.1 : libxml2 (EulerOS-SA-2026-2028)

According to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not...