JLSEC-2026-237 The function `X509_VERIFY_PARAM_add0_policy()` is documented to implicitly enable the certificate...

The function X509VERIFYPARAMadd0policy is documented to implicitly enable the certificate policy check when doing certificate verification. However the implementation of the function does not enable the check which allows certificates with invalid or incorrect policies to pass the certificate...

JLSEC-2026-277 Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can...

Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can send contents of an uninitialized memory buffer to a malicious peer. Impact summary: The uninitialized buffer might contain sensitive data from the previous execution of the application process whi...

JLSEC-2026-250 Issue summary: Checking excessively long DSA keys or parameters may be very slow.

Issue summary: Checking excessively long DSA keys or parameters may be very slow. Impact summary: Applications that use the functions EVPPKEYparamcheck or EVPPKEYpubliccheck to check a DSA public key or DSA parameters may experience long delays. Where the key or parameters that are being checked...

JLSEC-2026-253 Issue summary: Applications performing certificate name checks (e.g., TLS clients checking server...

Issue summary: Applications performing certificate name checks e.g., TLS clients checking server certificates may attempt to read an invalid memory address resulting in abnormal termination of the application process. Impact summary: Abnormal termination of an application can a cause a denial of...

JLSEC-2026-236 Applications that use a non-default option when verifying certificates may be vulnerable to an...

Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that...

JLSEC-2026-241 Issue summary: Checking excessively long DH keys or parameters may be very slow.

Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DHcheck, DHcheckex or EVPPKEYparamcheck to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been...

CVE-2026-6357

pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python modules names. These module imports were intentionally deferred to increase startup time of the pip CLI. The patch changes self-update functionality to run...

CVE-2026-30368

A client-side authorization flaw in Lightspeed Classroom v5.1.2.1763770643 allows unauthenticated attackers to impersonate users by bypassing integrity checks and abusing client-generated authorization tokens, leading to unauthorized control and monitoring of student devices...

CVE-2026-42371

uriparser before 1.0.1 has numeric truncation in text range comparison, if an application accepts URIs with a length in gigabytes...

A week in security (April 20 – April 26)

Last week on Malwarebytes Labs: Medical data of 500,000 UK volunteers listed for sale on Alibaba How cyberattacks on companies affect everyone Apple fixes iOS bug that kept deleted notifications, including chat previews Roblox clamps down on chats and age checks as legal pressure builds Malicious...

CVE-2026-42371

uriparser before 1.0.1 has numeric truncation in text range comparison, if an application accepts URIs with a length in gigabytes...

freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface

A heap buffer overflow has been discovered in FreeRDP. The URBDRC client uses server-supplied interface numbers as array indices without bounds checks, causing an out-of-bounds read in libusbudevselectinterface...

golang: cmd/compile: no-op interface conversion bypasses overlap checking

A flaw was found in the cmd/compile package in the Go standard library. A no-op interface conversion prevented the compiler from correctly identifying non-overlapping memory moves. As a result, the compiler allows unsafe memory move operations to occur at runtime, potentially causing data...

webkitgtk: Visiting a maliciously crafted website may lead to a cross-site scripting attack

A flaw was found in WebKitGTK. A maliciously crafted web page can cause a logic issue due to improper checks and result in a cross-site scripting attack...

PT-2026-35344

Name of the Vulnerable Software and Affected Versions Highland Software Custom Role Manager versions prior to 1.0.1 Description The Highland Software Custom Role Manager plugin for WordPress allows privilege escalation due to insufficient authorization checks in the hscrm save user roles function...

Uriparser 安全漏洞

UriParser is a C89-compatible library for parsing and processing URIs, strictly conforming to RFC 3986 standards. Versions of UriParser prior to 1.0.1 contained security vulnerabilities, which were caused by numerical truncation during text range comparisons...

WordPress plugin Highland Software Custom Role Manager 安全漏洞

WordPress and WordPress plugins are both products of the WordPress Foundation. WordPress is a blog platform developed using the PHP language. This platform allows for the creation of personal blog websites on servers based on PHP and MySQL. A WordPress plugin is an application that extends the...

PT-2026-35559

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.3.28 Description Improper authorization checks in the 'chat.send' path allow write-scoped gateway callers to perform admin-only session reset operations. This enables attackers to rotate target sessions, archive...

PT-2026-35558

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.3.31 Description A path traversal issue exists in the ACP dispatch component. This allows remote attackers to read arbitrary files by manipulating inbound channel attachment paths, bypassing the root directory...

From Spoofing to Trust: Emergency Alerts Spoofing Testbed and Cross-Cell Verification

Public warning systems PWS in cellular networks enable authorities to broadcast emergency alerts to all mobile phones in a geographic region in the event of threats such as earthquakes or severe weather. If an attacker can imitate these alerts and transmit a forged warning containing fake news or...