CVE-2022-46170Network attack vector

Authentication bypass via unscoped session identifiers

Published Dec 22, 2022 · Updated Apr 15, 2025

Improper authentication in CodeIgniter 4 before 4.2.11 allows remote attackers holding one session cookie to access another session context. The DatabaseHandler, MemcachedHandler, and RedisHandler keyed sessions without including the configured cookie name, allowing equal session IDs from distinct cookies to resolve to the same stored record. Exploitation requires multiple session cookies, one of those three shared-storage handlers, and possession of one valid session cookie; access is limited to the other cookie's application context.

CVSS severity8.6
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in CodeIgniter 4 before 4.2.11 allows remote attackers holding one session cookie to access another session context. The DatabaseHandler, MemcachedHandler, and RedisHandler keyed sessions without including the configured cookie name, allowing equal session IDs from distinct cookies to resolve to the same stored record. Exploitation requires multiple session cookies, one of those three shared-storage handlers, and possession of one valid session cookie; access is limited to the other cookie's application context.

The record

CVE
CVE-2022-46170
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
CodeIgniter Foundation
Product
CodeIgniter 4
Classifications
CWE-287, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=< 4.2.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CodeIgniter Foundation · CodeIgniter 4version=< 4.2.11

Published CVSS scores

8.6GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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