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TI-2021-05824 Aliases CVE-2021-22963GHSA-p6vg-p826-qp3v

Open redirect in https://github.com/fastify/fastify-static

Priority LOW 30CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-601.

Summary

A redirect vulnerability in the fastify-static module version < 4.2.4 allows remote attackers to redirect users to arbitrary websites via a double slash // followed by a domain: http://localhost:3000//google.com/%2e%2e.The issue shows up on all the fastify-static applications that set redirect: true option. By default, it is false.

Why it matters now

EPSS 0.01169 67th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial fastify-static (npm): 4.2.4Red Hat: 1 advisoryRed Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—https://github.com/fastify/fastify-staticAffects < v4.2.4. Fixed in >= v4.2.4—No fix listedCNA
—fastify-static (npm)before 4.2.44.2.4Patch availableGHSA-p6vg-p826-qp3v
  • https://github.com/fastify/fastify-static Vendor— Affected Affects < v4.2.4. Fixed in >= v4.2.4 Fixed in — No fix listed CNA
  • fastify-static (npm) Vendor— Affected before 4.2.4 Fixed in 4.2.4 Patch available GHSA-p6vg-p826-qp3v

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:fastify:fastify-static:*:*:*:*:*:*:*:*before 4.2.4Vulnerablefastify
  • cpe:2.3:a:fastify:fastify-static:*:*:*:*:*:*:*:* Versions before 4.2.4 Vulnerable ·fastify

Remediation

  • Fix · GHSA-p6vg-p826-qp3v fastify-static (npm) Fixed in 4.2.4 Advisory →

Red Hat 1 advisory

  • RHSA-2022:0735 Released 2022-03-03 · Red Hat rating Important
    Red Hat Advanced Cluster Management 2.4.2 security updates and bug fixes
    • Red Hat Advanced Cluster Management for Kubernetes 2.4 for RHEL 8 rhacm2/acm-grafana-rhel8, rhacm2/acm-must-gather-rhel8, rhacm2/acm-operator-bundle +47

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix yet

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22963
  2. 2026-10-03 Alias added: GHSA-p6vg-p826-qp3v

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-15143 @fastify/static vulnerable to route guard bypass via non-canonical path segments CVSS 3.1HIGH 7.5
  • TI-2026-12689 @fastify/static vulnerable to route guard bypass via path traversal CVSS 3.1HIGH 7.5
  • TI-2021-05825 Uncontrolled resource consumption in https://github.com/fastify/fastify-static CVSS 3.1HIGH 8.8
  • TI-2026-05626 @fastify/static vulnerable to path traversal in directory listing CVSS 3.1MEDIUM 5.3
  • TI-2026-06243 @fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths CVSS 3.1MEDIUM 5.3
  • TI-2026-05629 @fastify/static vulnerable to route guard bypass via encoded path separators CVSS 3.1MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences