GHSA-vvpx-j8f3-3w6h BIT-golang-2022-41723 CVE-2022-41723 GO-2023-1571

golang.org/x/net vulnerable to Uncontrolled Resource Consumption

High Go

Severity: 7.5 / 10; High · CVSS 3.1
Exploit chance (EPSS): 4.56%; Chance of exploitation in the next 30 days. Higher than 91.60% of scored vulnerabilities.
Known exploited: No; Not in CISA's catalog
Weakness: CWE-400 Uncontrolled Resource Consumption
Fix: Available; 2 packages have a fixed version

Description

A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests.

Affected versions

Go

Package	Vulnerable	Fixed in
golang.org/x/net	`< 0.7.0`	`0.7.0`
stdlib	`< 1.19.6` `>= 1.20.0-0, < 1.20.1`	`1.19.6` `1.20.1`

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.

golang.org/x/net Go → `0.7.0`

go

go get golang.org/x/net@v0.7.0 && go mod tidy

stdlib Go → `1.20.1`

go

go get stdlib@v1.20.1 && go mod tidy

Severity breakdown

CVSS 3.1 7.5

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

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Weakness

CWE-400: Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

How to prevent it

Architecture and Design: Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
Architecture and Design: Mitigation of resource exhaustion attacks requires that the target system either: recognizes the attack and denies that user further access for a given amount of time, or uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed. The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question. The second solution is simply difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
Architecture and Design: Ensure that protocols have specific limits of scale placed on them.
Implementation: Ensure that all failures in resource allocation place the system into a safe posture.

References

Advisories

Timeline

Feb 16, 2023 Published
Sep 10, 2026 Last updated by the source
Oct 31, 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 golang.org/x/net
GHSA-qppj-fm5r-hxr3 HTTP/2 Stream Cancellation Attack	Medium Known exploited	Also affects golang.org/x/net
CVE-2020-0601 Certificate validation bypass on Windows in crypto/x509	High Known exploited	Also affects stdlib
GO-2026-6866 Check all ancestor namespace transitions when rendering raw text in html in golang.org/x/net	Not rated yet	Also affects golang.org/x/net
GO-2026-6860 Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net	Not rated yet	Also affects golang.org/x/net
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

Credits: Philippe Antoine (Catena cyber)

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