go1.26.4 includes security fixes to the crypto/x509, mime, and
net/textproto packages, as well as bug fixes to the compiler, the
runtime, the go fix command, and the crypto/fips140 package
Signed-off-by: Akhil Mohan <akhilerm@gmail.com>
GHA runners occasionally experience I/O constraints during root-test
test execution. While concurrent tests rapidly allocate loopback
devices, background udev probing stalls. This quickly exhausts
systemd-udevd's default worker pool ceiling (20 children max), stalling
netlink uevent processing so device-mapper device nodes are never
created for subsequent dm-verity test execution.
Logging cgroups v2 pids.peak telemetry confirmed peak in-flight udev
workers accumulate to 325 during test execution. Raising the
children-max limit to 500 provides comfortable buffer room so udevd
freely spawns worker processes without entering event lockup or causing
test timeouts.
Assisted-by: Antigravity
Signed-off-by: Chris Henzie <chrishenzie@gmail.com>
Update the setup-go version in our private action yml to
1) be pinned by hash (with comment to version string)
2) remove cache disable that was fixed 3 years ago
Signed-off-by: Phil Estes <estesp@amazon.com>
Update the Fuzzing workflow to upload crash artifacts found during the
go_test_fuzz job. Currently, when `go test -fuzz` fails, the crash
reproducers are generated but not preserved, making it difficult to
diagnose and fix the issues discovered in CI.
This change adds an upload-artifact step that captures all files in
testdata/fuzz directories across the repository upon failure.
Assisted-by: gemini-cli
Signed-off-by: Samuel Karp <samuelkarp@google.com>
Signed-off-by: lauralorenz <lauralorenz@google.com>
merge_group CI is primarily a final sanity check that queued changes still compose cleanly, not a place to rerun every expensive advisory suite.
Skip Windows integration, Vagrant integration, and Kubernetes node e2e for merge_group because those jobs are costly and have recurring flakes, which wastes merge-queue capacity and delays unrelated merges.
They still run on pull_request events for advisory coverage, and the existing aggregate required status check name is unchanged.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This release include 11 security fixes:
- cmd/go: malicious module proxy can bypass checksum database
A malicious module proxy could exploit a flaw in the go command's
validation of module checksums to bypass checksum database validation.
This vulnerability affects any user using an untrusted module proxy
(GOMODPROXY) or checksum database (GOSUMDB).
A malicious module proxy can serve altered versions of the Go toolchain.
When selecting a different version of the Go toolchain than the
currently installed toolchain (due to the GOTOOLCHAIN environment variable,
or a go.work or go.mod with a toolchain line), the go command will download
and execute a toolchain provided by the module proxy. A malicious module
proxy can bypass checksum database validation for this downloaded
toolchain.
Since this vulnerability affects the security of toolchain downloads,
setting GOTOOLCHAIN to a fixed version is not sufficient. You must upgrade
your base Go toolchain.
The go tool always validates the hash of a toolchain before executing it,
so fixed versions will refuse to execute any cached, altered versions of the
toolchain.
The go tool trusts go.sum files to contain accurate hashes of the current
module's dependencies. A malicious proxy exploiting this vulnerability to
serve an altered module will have caused an incorrect hash to be recorded
in the go.sum. Users who have configured a non-trusted GOPROXY can determine
if they have been affected by running "rm go.sum ; go mod tidy ; go mod verify",
which will revalidate all dependencies of the current module.
The specific flaw in more detail:
The go command consults the checksum database to validate downloaded modules,
when a module is not listed in the go.sum file. It verifies that the module hash
reported by the checksum database matches the hash of the downloaded module.
If, however, the checksum database returns a successful response that contains
no entry for the module, the go command incorrectly permitted validation to succeed.
A module proxy may mirror or proxy the checksum database, in which case the go
command will not connect to the checksum database directly. Checksums reported
by the checksum database are cryptographically signed, so a malicious proxy
cannot alter the reported checksum for a module. However, a proxy which returns
an empty checksum response, or a checksum response for an unrelated module,
could cause the go command to proceed as if a downloaded module has been validated.
The go command now properly checks checksum database responses to ensure
that the expected module signature is present, not just that if a signature is
present it matches the expectation.
Thanks to Mundur (https://github.com/M0nd0R) for reporting this issue.
This is CVE-2026-42501 and Go issue https://go.dev/issue/79070.
- net/http/httputil: ReverseProxy forwards queries with more than urlmaxqueryparams parameters
When used with a Rewrite function, or a Director function which parses query parameters,
ReverseProxy sanitizes the forwarded request to remove query parameters which are not
parsed by url.ParseQuery. ReverseProxy did not take ParseQuery's limit on the total number
of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account.
This could permit ReverseProxy to forward a request containing a query parameter
that was not visible to the Rewrite function.
For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" could forward the parameter
"hidden=y" while hiding it from the proxy's Rewrite function.
ReverseProxy now avoids forwarding parameters that exceed the ParseQuery limit.
This is CVE-2026-39825 and Go issue https://go.dev/issue/78948.
- net: panic in Dial and LookupPort when handling NUL byte on Windows
The Dial and LookupPort functions would panic on Windows when provided
with an input containing a NUL (0). These functions now return an error
rather than panicking.
This is CVE-2026-39836 and Go issue https://go.dev/issue/79006.
- net/mail: quadratic string concatenation in consumePhrase
Pathological inputs could cause DoS through consumePhrase
when parsing an email address according to RFC 5322.
This is CVE-2026-42499 and Go issue https://go.dev/issue/78987.
- net/mail: quadratic string concatentation in consumeComment
Well-crafted inputs reaching ParseAddress, ParseAddressList,
and ParseDate were able to trigger excessive CPU exhaustion
and memory allocations.
This is CVE-2026-39820 and Go issue https://go.dev/issue/78566.
- cmd/go: "go bug" follows symlinks in predictable temporary filenames
The "go bug" command wrote to two files with predictable names in
the system temporary directory (for example, "/tmp").
An attacker with access to the temporary directory could create a
symlink in one of these names, causing "go bug" to overwrite the
target of the symlink.
The "go bug" command now uses os.MkdirTemp to create a safe
working directory.
Thanks to Harshit Gupta (Mr HAX) for reporting this issue.
This is CVE-2026-39819 and Go issue https://go.dev/issue/78584.
- cmd/go: "go tool pack" does not sanitize output paths
The "go tool pack" subcommand is a minimal version of the Unix ar utility.
It is used by the compiler as an internal tool with known-good inputs.
The "pack" subcommand did not sanitize output filenames.
When invoked to extract a malicious archive file, it could write
files to arbitrary locations on the filesystem.
The "pack" subcommand now refuses to extract files with names
containing any directory components.
Thanks to Harshit Gupta (Mr HAX) for reporting this issue.
This is CVE-2026-39817 and Go issue https://go.dev/issue/78778.
- net/http: infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE
When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of
writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a
value of 0.
This allows potential DoS against a client by a malicious server. HTTP/2
transport now properly checks that the received SETTINGS_MAX_FRAME_SIZE is
valid.
Thanks to Marwan Atia (marwansamir688@gmail.com) for reporting this issue.
This is CVE-2026-33814 and Go issue https://go.dev/issue/78476.
- html/template: escaper bypass leads to XSS
If a trusted template author were to write a
tag containing an empty type attribute or a type
attribute with an ASCII whitespace, the execution of
the template would incorrectly escape any data passed
into the block.
Thanks to Mundur (https://github.com/M0nd0R) for reporting this issue.
This is CVE-2026-39826 and Go issue https://go.dev/issue/78981.
- net: crash when handling long CNAME response
When using LookupCNAME with the cgo DNS resolver,
a very long CNAME response could trigger a double-free of C memory
and a crash. The double-free has been fixed.
Thanks to hamayanhamayan for reporting this issue.
This is CVE-2026-33811 and Go issue https://go.dev/issue/78803.
- html/template: bypass of meta content URL escaping causes XSS
CVE-2026-27142 fixed a vulnerability in which URLs were not
correctly escaped inside of a tag's attribute.
If the URL content were to insert ASCII whitespaces around the
= rune inside of the attribute, the escaper would
fail to similarly escape it, leading to XSS.
Dynamic inputs to a tag's attribute are now
whitespace sanitized prior to escaping.
Thanks to Samy Ghannad for reporting this issue.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Add inputs to workflow_call in node-e2e.yml to allow specifying
Kubernetes branch or tag to test against. Update checkout step
to use this input, defaulting to master.
This enables testing containerd against specific Kubernetes release
branches, which is required for verifying compatibility with extended
support windows for Kubernetes distros that require them.
Signed-off-by: Chris Henzie <chrishenzie@gmail.com>
Assisted-by: Antigravity
This change updates the Go version from 1.26.0 to 1.26.2 across the
repository, including CI configurations, build scripts, and development
environments.
Signed-off-by: Sergey Kanzhelev <S.Kanzhelev@live.com>
This change updates the Go version from 1.25.8 to 1.26.0 across the
repository, including CI configurations, build scripts, and development
environments.
It also fixes two linter issues discovered after upgrading the Go version:
- core/snapshots/storage/bolt.go: incorrect printf format for uint64
- plugins/transfer/plugin.go: incorrect printf format for int and unused variable
The golangci-lint version in script/setup/install-dev-tools is also updated to v2.9.0
to match CI.
Signed-off-by: Sergey Kanzhelev <S.Kanzhelev@live.com>
