CVE-2023-33189 — Vulnerability in github.com/pomerium/pomerium —...

CRITICAL

Pomerium vulnerable to Incorrect Authorization with specially crafted requests

Published May 26, 2023Updated September 10, 2026Source: osv

Summary

### Impact With specially crafted requests, incorrect authorization decisions may be made by Pomerium. ### Patches We are releasing patch fixes to address this vulnerability going back to `v0.17.X`. Please upgrade to: - v0.22.2 - v0.21.4 - v0.20.1 - v0.19.2 - v0.18.1 - v0.17.4 ### For more information If you have any questions or comments about this advisory: - Open an issue in [pomerium/pomerium](https://github.com/pomerium/pomerium/issues) - Email us at [security@pomerium.com](mailto:security@pomerium.com)

Advisory Timeline

First published May 26, 2023 (1235 days ago).
Last revised September 10, 2026 — 1202 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Update github.com/pomerium/pomerium to 0.22.2 or later

go get github.com/pomerium/pomerium@v0.22.2

Update github.com/pomerium/pomerium to 0.19.2 or later

go get github.com/pomerium/pomerium@v0.19.2

Update github.com/pomerium/pomerium to 0.20.1 or later

go get github.com/pomerium/pomerium@v0.20.1

Update github.com/pomerium/pomerium to 0.21.4 or later

go get github.com/pomerium/pomerium@v0.21.4

Update github.com/pomerium/pomerium to 0.18.1 or later

go get github.com/pomerium/pomerium@v0.18.1

Update github.com/pomerium/pomerium to 0.17.4 or later

go get github.com/pomerium/pomerium@v0.17.4

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

Affected Packages (6)

Affects 1 ecosystem: go (1).

Package	Ecosystem	Affected	Fixed In
github.com/pomerium/pomerium	go	All versions	0.22.2
github.com/pomerium/pomerium	go	All versions	0.19.2
github.com/pomerium/pomerium	go	All versions	0.20.1
github.com/pomerium/pomerium	go	All versions	0.21.4
github.com/pomerium/pomerium	go	All versions	0.18.1
github.com/pomerium/pomerium	go	All versions	0.17.4

Vulnerability Classification

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

CWE-285
Improper AuthorizationMITRE

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

None

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

References

Frequently Asked Questions

What is CVE-2023-33189?: Pomerium vulnerable to Incorrect Authorization with specially crafted requests 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-2023-33189?: CVE-2023-33189 affects github.com/pomerium/pomerium. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-33189 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-pvrc-wvj2-f59p

GO-2023-1800

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