The Go project reports:
cmd/go: go.mod toolchain directive allows arbitrary
execution
The go.mod toolchain directive, introduced in Go 1.21,
could be leveraged to execute scripts and binaries
relative to the root of the module when the "go" command
was executed within the module. This applies to modules
downloaded using the "go" command from the module proxy,
as well as modules downloaded directly using VCS software.
html/template: improper handling of HTML-like comments
within script contexts
The html/template package did not properly handle
HMTL-like "<!--" and "-->"
comment tokens, nor hashbang "#!" comment tokens, in
<script> contexts. This may cause the template
parser to improperly interpret the contents of
<script> contexts, causing actions to be improperly
escaped. This could be leveraged to perform an XSS attack.
html/template: improper handling of special tags within
script contexts
The html/template package did not apply the proper rules
for handling occurrences
of "<script", "<!--", and "</script" within JS
literals in <script< contexts. This may cause the
template parser to improperly consider script contexts to
be terminated early, causing actions to be improperly
escaped. This could be leveraged to perform an XSS attack.
crypto/tls: panic when processing post-handshake message
on QUIC connections
Processing an incomplete post-handshake message for a QUIC
connection caused a panic.