Loading...
Skip to main content
GeekWala

CVE-2019-9901 — Vulnerability in github.com/envoyproxy/envoy — CVE...

CRITICAL

EnvoyProxy Envoy Missing HTTP URL path normalization

Published May 24, 2022Updated September 10, 2026Source: osv

Summary

Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., `something/../admin`, to bypass access control, e.g., a block on `/admin`. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.

Advisory Timeline

  • First published May 24, 2022 (1602 days ago).
  • Last revised September 10, 2026 — 1569 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Go
Update github.com/envoyproxy/envoy to 1.9.1 or later
go get github.com/envoyproxy/envoy@v1.9.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/envoyproxy/envoy
go
All versions1.9.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 10.0 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2019-9901?
EnvoyProxy Envoy Missing HTTP URL path normalization This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 10.0/10).
How do I check if my project is affected by CVE-2019-9901?
CVE-2019-9901 affects github.com/envoyproxy/envoy. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2019-9901 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
10.0

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-2wmf-p7f8-w42h
GHSA-xcx5-93pw-jw2w

Related CVEs

  • CVE-2026-107806
    CRITICAL

    Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite

  • CVE-2026-68582
    CRITICAL

    Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA)

  • CVE-2026-53713
    CRITICAL

    Envoy Gateway: Authentication Bypass via Improper Input Validation in EnvoyExtensionPolicy Lua Allows Secret Disclosure

  • CVE-2026-22771
    HIGH

    Envoy Extension Policy lua scripts injection causes arbitrary command execution

More Go Modules advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies