CVE-2021-39206

Incorrect Authorization with specially crafted requests

HIGH
8.6
CVSS Score
Published: September 9, 2021 at 10:10 PM UTC
Updated: June 17, 2026 at 04:03 AM UTC
2 products affected across 2 vendorsEnvoyPomerium

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Severity
HIGH8.6
Exploit prediction
EPSS 1%

Description

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, contains two authorization related vulnerabilities CVE-2021-32777 and CVE-2021-32779. This may lead to incorrect routing or authorization policy decisions. With specially crafted requests, incorrect authorization or routing decisions may be made by Pomerium. Pomerium v0.14.8 and v0.15.1 contain an upgraded envoy binary with these vulnerabilities patched. This issue can only be triggered when using path prefix based policy. Removing any such policies should provide mitigation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.16.51.17.0 ≤ v < 1.17.41.18.0 ≤ v < 1.18.41.19.0
Affected range stops below 1.16.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.17.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.18.4, so it looks safe — our inference, not a vendor statement
v < 0.14.8v < 0.15.10.11.0 ≤ v < 0.14.80.15.0
Affected range stops below 0.14.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.15.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

8.6HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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