thunderbird: Spoofing issue in Thunderbird

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Spoofing issue in Thunderbird...

PT-2026-33866

OpenClaw before 2026.3.28 contains an authorization bypass vulnerability in the chat.send gateway method where ACP-only provenance fields are gated by self-declared client metadata from WebSocket handshake rather than verified authorization state. Authenticated operator clients can spoof ACP...

PT-2026-33850

Name of the Vulnerable Software and Affected Versions glibc versions prior to 2.44 Description The obsolete nis local principal function may overflow a buffer in the data section. This allows an attacker to spoof a crafted response to a UDP request generated by this function and overwrite...

A Novel Quantum Augmented Framework to Improve Microgrid Cybersecurity

Small modular nuclear reactors SMRs are redefining the energy generation landscape by enabling the deployment of modular, scalable, and pre-built power units that can be used to build distributed autonomous microgrids for critical infrastructure and burgeoning AI factories. Often, these microgrid...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

EUVD-2026-23634

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-40487

Postiz is an AI social media scheduling tool. Before version 2.21.6, a file upload validation bypass lets any authenticated user upload HTML/SVG or other executable types by spoofing Content-Type, after which nginx serves them with a Content-Type derived from the original extension (text/html, im...

ruby: use of predictable source port and transaction id in DNS requests done by resolv.rb module

resolv.rb in Ruby 1.8.5 and earlier, 1.8.6 before 1.8.6-p287, 1.8.7 before 1.8.7-p72, and 1.9 r18423 and earlier uses sequential transaction IDs and constant source ports for DNS requests, which makes it easier for remote attackers to spoof DNS responses, a different vulnerability than...

ruby: Cookie prefix spoofing in CGI::Cookie.parse

A flaw was found in Ruby. RubyGems cgi gem could allow a remote attacker to conduct spoofing attacks caused by the mishandling of security prefixes in cookie names in the CGI::Cookie.parse function. By sending a specially-crafted request, an attacker could perform cookie prefix spoofing attacks...

cpython: email header injection due to unquoted newlines

A flaw was found in the email module in the Python standard library. When serializing an email message, the BytesGenerator class fails to properly quote newline characters for email headers. This issue is exploitable when the LiteralHeader class is used as it does not respect email folding rules,...

Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

GHSA-MH4X-RMRX-3HP4 Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

OESA-2026-1993 thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fixes: libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.CVE-2025-59375 Spoofing issue in Thunderbird. This vulnerability was fixed ...

OESA-2026-1994 thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fixes: libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.CVE-2025-59375 Spoofing issue in Thunderbird. This vulnerability was fixed ...

April Microsoft Patch Tuesday

April Microsoft Patch Tuesday. A total of 167 vulnerabilities, about twice as many as in March. There is one vulnerability already being exploited in the wild: 🔻 Spoofing - Microsoft SharePoint Server CVE-2026-32201. ZDI experts say "Spoofing bugs in SharePoint often manifest as cross-site...

PT-2026-33513

Name of the Vulnerable Software and Affected Versions WeGIA versions prior to 3.6.10 Description An issue exists in the dao/memorando/UsuarioDAO.php file where the cpf usuario POST parameter overwrites the session-stored user identity through the extract$ REQUEST function in...

Microsoft Visual Studio Products (April 2026)

The Microsoft Visual Studio Products are missing security updates. It is, therefore, affected by multiple vulnerabilities: - Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network. CVE-2026-32203 - Improper neutralization of special...

Microsoft .NET Core (April 2026)

The Microsoft .NET Core installations on the remote host are missing security updates. It is, therefore, affected by multiple vulnerabilities: - Denial of Service CVE-2026-26171, CVE-2026-32203, CVE-2026-33116 - Improper neutralization of special elements in .NET allows an unauthorized attacker t...