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chore(deps): update module golang.org/x/net to v0.56.0 [security] - #6

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ecv merged 2 commits into
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renovate/go-golang.org-x-net-vulnerability
Sep 10, 2026
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chore(deps): update module golang.org/x/net to v0.56.0 [security]#6
ecv merged 2 commits into
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renovate/go-golang.org-x-net-vulnerability

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@renovate renovate Bot commented Sep 9, 2026

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This PR contains the following updates:

Package Change Age Confidence
golang.org/x/net v0.45.0 → v0.56.0 age confidence

Go Net HTML parser is vulnerable to denial of service

CVE-2026-25680 / GHSA-5cv4-jp36-h3mw

More information

Details

In Go Net (golang.org/x/net) before verion 0.55.0, parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Severity

  • CVSS Score: 6.5 / 10 (Medium)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

BIT-golang-2026-33814 / CVE-2026-33814 / GO-2026-4918

More information

Details

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.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Go Net HTML parser is vulnerable to denial of service

CVE-2026-25680 / GHSA-5cv4-jp36-h3mw / GO-2026-5028

More information

Details

In Go Net (golang.org/x/net) before verion 0.55.0, parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Severity

  • CVSS Score: 6.5 / 10 (Medium)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net/html

CVE-2026-42506 / GO-2026-5025

More information

Details

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

CVE-2026-39821 / GO-2026-5026

More information

Details

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error.

This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Invoking incorrect handling of HTML elements in foreign content in golang.org/x/net/html

CVE-2026-42502 / GO-2026-5027

More information

Details

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html

CVE-2026-25680 / GHSA-5cv4-jp36-h3mw / GO-2026-5028

More information

Details

Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html

CVE-2026-25681 / GO-2026-5029

More information

Details

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Invoking duplicate attributes can cause XSS in golang.org/x/net/html

CVE-2026-27136 / GO-2026-5030

More information

Details

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Parsing an invalid SVCB or HTTPS RR can panic in golang.org/x/net/dns/dnsmessage

BIT-golang-2026-46600 / CVE-2026-46600 / GO-2026-5942

More information

Details

Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer.

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

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This PR was generated by Mend Renovate. View the repository job log.

@renovate

renovate Bot commented Sep 9, 2026

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ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

  • 3 additional dependencies were updated
  • The go directive was updated for compatibility reasons

Details:

Package Change
go 1.24.7 -> 1.25.0
golang.org/x/sys v0.37.0 -> v0.46.0
golang.org/x/term v0.36.0 -> v0.44.0
golang.org/x/text v0.30.0 -> v0.38.0

@ecv
chore: build and lint with Go 1.25 to match the go directive
f7afcd6 
x/net v0.56.0 raises the module's go directive to 1.25.0. The builder
image, the CI Go version, and the e2e Go version all pinned 1.24, and the
Dockerfile runs with GOTOOLCHAIN=local, so every job failed before it
reached the code. golangci-lint moves to v2.4.0, the first line built on
Go 1.25, so it can load a 1.25 target.

Claude-Session: https://claude.ai/code/session_01T2Bmcs7qWPaw1R6HnmrmBq
@renovate

renovate Bot commented Sep 10, 2026

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Edited/Blocked Notification

Renovate will not automatically rebase this PR, because it does not recognize the last commit author and assumes somebody else may have edited the PR.

You can manually request rebase by checking the rebase/retry box above.

⚠️ Warning: custom changes will be lost.

ecv
ecv approved these changes Sep 10, 2026
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x/net v0.56.0 needs go 1.25. Builder image, CI Go version, e2e Go version, and golangci-lint all moved to a 1.25 line; lint, unit, e2e, and image build green on this head. Once this merges, #7 and #8 rebase onto it and go green without changes.

@ecv
ecv requested a review from kevwilliams September 10, 2026 03:53
kevwilliams
kevwilliams approved these changes Sep 10, 2026
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Isolated go.mod/go.sum bump (golang.org/x/net v0.45.0 → v0.56.0, indirect dep) plus a routine Go 1.24→1.25 toolchain bump in CI/Dockerfile. Fixes multiple real CVEs (HTTP/2 SETTINGS infinite loop, HTML parser DoS, idna Punycode spoofing, several HTML-tree XSS issues). Version jump is a normal minor-series update, no unrelated changes, all CI checks green. LGTM.

@ecv
ecv merged commit 775e123 into main Sep 10, 2026
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@ecv
ecv deleted the renovate/go-golang.org-x-net-vulnerability branch September 10, 2026 16:46
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@ecv ecv ecv approved these changes
@kevwilliams kevwilliams kevwilliams approved these changes

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