Update module golang.org/x/net to v0.56.0 [SECURITY] (release-v0.19) - #597
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This PR contains the following updates:
v0.34.0→v0.56.0HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
CVE-2025-22870 / GHSA-qxp5-gwg8-xv66 / GO-2025-3503
More information
Details
Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80` will incorrectly match and not be proxied.
Severity
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:LReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
CVE-2025-22870 / GHSA-qxp5-gwg8-xv66 / GO-2025-3503
More information
Details
Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80` will incorrectly match and not be proxied.
Severity
Unknown
References
This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).
golang.org/x/net vulnerable to Cross-site Scripting
CVE-2025-22872 / GHSA-vvgc-356p-c3xw / GO-2025-3595
More information
Details
The tokenizer incorrectly interprets tags with unquoted attribute values that end with a solidus character (/) as self-closing. When directly using Tokenizer, this can result in such tags incorrectly being marked as self-closing, and when using the Parse functions, this can result in content following such tags as being placed in the wrong scope during DOM construction, but only when tags are in foreign content (e.g. , , etc contexts).
Severity
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:NReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Incorrect Neutralization of Input During Web Page Generation in x/net in golang.org/x/net
CVE-2025-22872 / GHSA-vvgc-356p-c3xw / GO-2025-3595
More information
Details
The tokenizer incorrectly interprets tags with unquoted attribute values that end with a solidus character (/) as self-closing. When directly using Tokenizer, this can result in such tags incorrectly being marked as self-closing, and when using the Parse functions, this can result in content following such tags as being placed in the wrong scope during DOM construction, but only when tags are in foreign content (e.g. , , etc contexts).
Severity
Unknown
References
This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).
Quadratic parsing complexity in golang.org/x/net/html
CVE-2025-47911 / GHSA-w4gw-w5jq-g9jh / GO-2026-4440
More information
Details
The html.Parse function in golang.org/x/net/html has quadratic parsing complexity when processing certain inputs, which can lead to denial of service (DoS) if an attacker provides specially crafted HTML content.
Severity
Unknown
References
This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).
Infinite parsing loop in golang.org/x/net
CVE-2025-58190 / GO-2026-4441
More information
Details
The html.Parse function in golang.org/x/net/html has an infinite parsing loop when processing certain inputs, which can lead to denial of service (DoS) if an attacker provides specially crafted HTML content.
Severity
Unknown
References
This data is provided by OSV and the Go Vulnerability 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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HReferences
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
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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