GO-2025-3420 BIT-golang-2024-45336 CVE-2024-45336

Sensitive headers incorrectly sent after cross-domain redirect in net/http

Medium Go

Severity: 6.1 / 10; Medium · CVSS 3.1
Exploit chance (EPSS): 0.73%; Chance of exploitation in the next 30 days. Higher than 54.12% of scored vulnerabilities.
Known exploited: No; Not in CISA's catalog
Weakness: —; Not classified
Fix: 1.24.0-rc.2; Upgrade stdlib to this version or later

Description

The HTTP client drops sensitive headers after following a cross-domain redirect. For example, a request to a.com/ containing an Authorization header which is redirected to b.com/ will not send that header to b.com.

In the event that the client received a subsequent same-domain redirect, however, the sensitive headers would be restored. For example, a chain of redirects from a.com/, to b.com/1, and finally to b.com/2 would incorrectly send the Authorization header to b.com/2.

Affected versions

Go

Package	Vulnerable	Fixed in
stdlib	`< 1.22.11` `>= 1.23.0-0, < 1.23.5` `>= 1.24.0-0, < 1.24.0-rc.2`	`1.22.11` `1.23.5` `1.24.0-rc.2`

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

stdlib Go → `1.24.0-rc.2`

go

go get stdlib@v1.24.0-rc.2 && go mod tidy

Severity breakdown

CVSS 3.1 6.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

References

Fixes and patches

go.dev/cl/643100

Issue reports

go.dev/issue/70530

Timeline

Jan 28, 2025 Published
Jun 17, 2026 Last updated by the source
Nov 1, 2026 Latest EPSS score

Advisory	Severity	Why it's related
GHSA-4374-p667-p6c8 HTTP/2 rapid reset can cause excessive work in net/http	High Known exploited	Also affects stdlib
CVE-2020-0601 Certificate validation bypass on Windows in crypto/x509	High Known exploited	Also affects stdlib
RUSTSEC-2026-0382 Distrust compromised intermediate certificates in crypto/x509	Medium	Also affects stdlib
GO-2026-6613 HTTP/1 server connection desynchronization after 2xx CONNECT response in net/http	High	Also affects stdlib
GO-2026-6609 Lack of limit on size of parsed Range headers in net/http	High	Also affects stdlib
GO-2026-6608 Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart	High	Also affects stdlib
GO-2026-6607 Reject malformed ECH outer extension references in crypto/tls	High	Also affects stdlib
GO-2026-6604 Root.Mkdir(All) can follow junctions out of the root on Windows in os	Critical	Also affects stdlib

Credits: Kyle Seely

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