GHSA-8grv-jq2g-cfhw: Amphp/http server Denial of Service Vulnerability

MODERATE
Share
CVSS 5.3
CWE-400
Published
Advisory Summary

GHSA-8grv-jq2g-cfhw is a MODERATE (CVSS 5.3) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Amphp/http server libraries in the Packagist ecosystem. The issue involves amphp/http-server affected by http/2 ddos vulnerability. Remediation is available by upgrading affected packages to version 3.4.4, 2.1.10.

GHSA-8grv-jq2g-cfhw at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-8grv-jq2g-cfhw
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Amphp/http server
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix GHSA-8grv-jq2g-cfhw

To remediate this vulnerability, upgrade all affected Amphp/http server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

amphp/http-server fixed: 3.4.4 
Upgrade amphp/http-server to 3.4.4
amphp/http-server fixed: 2.1.10 
Upgrade amphp/http-server to 2.1.10
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for amphp/http-server

How to Check if You Are Affected

To determine whether your application is affected by GHSA-8grv-jq2g-cfhw, inspect your project dependencies for Amphp/http server:

inspect dependencies for amphp/http-server

Analyze the terminal output to locate any version of Amphp/http server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.4.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Amphp/http server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Versions of `amphp/http-server` prior to `3.4.4` for the 3.x release branch and prior to `2.1.10` for the 2.x release branch are vulnerable to the HTTP/2 "MadeYouReset" DoS attack described by CVE-2025-8671 and https://kb.cert.org/vuls/id/767506. In versions `3.4.4` and `2.1.10`, stream reset protection has been refactored to account for the number of reset streams within a sliding time window. Note that your application must expose HTTP/2 connections directly to be affected by this vulnerability. Servers behind a proxy using HTTP/1.x such as nginx are not affected.

GHSA-8grv-jq2g-cfhw Affected Amphp/http server Versions

2 component(s)
Fixed Versions:
3.4.42.1.10
Product / Package Ecosystem Affected Versions Fixed Version
amphp/http-server
 Packagist
≥ 3.0.0-beta.1
< 3.4.4
3.4.4
amphp/http-server
 Packagist
≥ 2.0.0-rc1
< 2.1.10
2.1.10

References

GitHub Advisory / Wiki ADVISORY
https://github.com/amphp/http-server/security/advisories/GHSA-8grv-jq2g-cfhw
Amphp/http server Source Repository REPOSITORY
https://github.com/amphp/http-server
Amphp/http server Release RELEASE
https://github.com/amphp/http-server/releases/tag/v2.1.10
Amphp/http server Release RELEASE
https://github.com/amphp/http-server/releases/tag/v3.4.4

Frequently Asked Questions

What is GHSA-8grv-jq2g-cfhw?
GHSA-8grv-jq2g-cfhw is a security vulnerability in Amphp/http server involving amphp/http-server affected by HTTP/2 DDoS vulnerability under CWE-400: Uncontrolled Resource Consumption.
Which Amphp/http server versions are affected?
Affected versions include releases prior to 3.4.4, 2.1.10 across affected packages: amphp/http-server.
What version fixes GHSA-8grv-jq2g-cfhw?
Upgrading to 3.4.4, 2.1.10 (or the latest patched release for your respective branch) resolves the vulnerability.
Is amphp/http-server affected?
Yes, amphp/http-server is affected in releases prior to 3.4.4, 2.1.10. Upgrade your dependency to 3.4.4, 2.1.10 or later.
What is the CVSS score of GHSA-8grv-jq2g-cfhw?
GHSA-8grv-jq2g-cfhw has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with GHSA-8grv-jq2g-cfhw?
GHSA-8grv-jq2g-cfhw is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Packagist dependencies for GHSA-8grv-jq2g-cfhw?
Run the dependency tree command: 'inspect dependencies for amphp/http-server'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8grv-jq2g-cfhw",
  "modified" : "2026-02-10T00:25:41Z",
  "published" : "2026-02-10T00:25:41Z",
  "aliases" : [ ],
  "summary" : "amphp/http-server affected by HTTP/2 DDoS vulnerability",
  "details" : "Versions of `amphp/http-server` prior to `3.4.4` for the 3.x release branch and prior to `2.1.10` for the 2.x release branch are vulnerable to the HTTP/2 \"MadeYouReset\" DoS attack described by CVE-2025-8671 and https://kb.cert.org/vuls/id/767506.\n\nIn versions `3.4.4` and `2.1.10`, stream reset protection has been refactored to account for the number of reset streams within a sliding time window.\n\nNote that your application must expose HTTP/2 connections directly to be affected by this vulnerability. Servers behind a proxy using HTTP/1.x such as nginx are not affected.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "amphp/http-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0-beta.1"
      }, {
        "fixed" : "3.4.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "amphp/http-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0-rc1"
      }, {
        "fixed" : "2.1.10"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/amphp/http-server/security/advisories/GHSA-8grv-jq2g-cfhw"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/amphp/http-server"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/amphp/http-server/releases/tag/v2.1.10"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/amphp/http-server/releases/tag/v3.4.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-10T00:25:41Z",
    "nvd_published_at" : null
  }
}