GHSA-W879-237Q-WC7R golang.org/x/crypto: Invoking pathological RSA/DSA parameters may cause DoS

The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public...

golang.org/x/crypto vulnerable to invoking bypass of certificate restrictions

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError...

GHSA-Q4H4-GMJ2-QVW2 golang.org/x/crypto: Invoking byte arithmetic causes underflow and panic

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs...

GHSA-JPPX-RXG9-JMRX golang.org/x/crypto doesn't enforce invoking key constraints

The in-memory keyring returned by NewKeyring silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring now returns an error when...

GO-2026-5311 Mattermost has a Path Traversal issue in github.com/mattermost/mattermost-server

Mattermost has a Path Traversal issue in github.com/mattermost/mattermost-server...

Beyond IOCs: AI-enabled threat intelligence

Welcome to this week's Threat Source newsletter. The issue of AI in cybersecurity is often portrayed as a binary choice: either a force multiplier for our adversaries, or a tool bringing professional obsolescence. The reality is more nuanced. While AI certainly brings some advantage to attackers,...

net/textproto: golang: Golang net/textproto: Misleading error messages via input injection

A flaw was found in the net/textproto package in Golang. When functions in this package return errors, they include their input as part of the error message. An attacker could exploit this by injecting misleading content into these error messages, which are then printed or logged. This could lead...

CVE-2026-54293

A flaw was found in NLTK Natural Language Toolkit. The nltk.data.load function is vulnerable to path traversal when processing specially crafted nltk: URLs. An attacker can exploit a decode-after-check flaw, where URL-encoded path separators and traversal segments bypass security checks. This...

UBUNTU-CVE-2026-57438

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, XInclude substitution performed by Nokogiri::XML::Nodedoxinclude replaced each in place, freeing the include node along with its children such as and its descendants and any namespaces declared on...

crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

CVE-2026-12844 List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function

List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function. pairwise collects the values returned by the block into a heap buffer sized to the longer input array, then grows the buffer before each copy with a single quadrupling alloc = 2 instead of a...

CVE-2026-12844 List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function

List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function. pairwise collects the values returned by the block into a heap buffer sized to the longer input array, then grows the buffer before each copy with a single quadrupling alloc = 2 instead of a...

UBUNTU-CVE-2026-57436

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Documentroot= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage...

UBUNTU-CVE-2026-57235

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet and its alias slice checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then...

CVE-2026-57437

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression...

CVE-2026-57436 Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Documentroot= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage...

EUVD-2026-39426

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri’s CRuby native extension could leave a Ruby wrapper pointing to freed memory when replacing the value of an XML attribute. If Ruby code had already accessed an attribute child node,...

CVE-2026-57435

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri’s CRuby native extension could leave a Ruby wrapper pointing to freed memory when replacing the value of an XML attribute. If Ruby code had already accessed an attribute child node,...

CVE-2026-57434

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. This caused a NULL pointer dereference that could...

CVE-2026-57234 Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, the NONET parse option, which Nokogiri turns on by default for Nokogiri::XML::Schema see CVE-2020-26247, was not correctly enforced on the JRuby implementation. As a result, a schema parsed with...