CVE-2022-29226Public exploitNetwork attack vector

Unauthenticated endpoint access via unvalidated bearer tokens

Published Jun 9, 2022 · Updated Apr 23, 2025

Authentication bypass in Envoy before 1.22.1 allows remote attackers to access OAuth-protected endpoints with an arbitrary bearer token. OAuth2Filter::decodeHeaders treated any Authorization bearer value as a completed flow and continued decoding without validating the token or requiring the HMAC-signed cookie. The OAuth filter must protect the requested endpoint; exploitation grants that endpoint's normal read or write access without authentication.

CVSS severity10.0
Critical
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Envoy before 1.22.1 allows remote attackers to access OAuth-protected endpoints with an arbitrary bearer token. OAuth2Filter::decodeHeaders treated any Authorization bearer value as a completed flow and continued decoding without validating the token or requiring the HMAC-signed cookie. The OAuth filter must protect the requested endpoint; exploitation grants that endpoint's normal read or write access without authentication.

The record

CVE
CVE-2022-29226
Published
Jun 9, 2022
Updated
Apr 23, 2025
Vendor
Envoy Proxy
Product
Envoy
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.22.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Envoy Proxy · Envoyversion=< 1.22.1

Published CVSS scores

10.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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