CVE-2022-46170: CodeIgniter is a PHP full-stack web framework

This month

HIGH 8.6REMOTEUPGRADE

CVE-2022-46170 is a high-severity flaw (CVSS 8.6) affecting codeigniter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CodeIgniter is a PHP full-stack web framework. When an application uses (1) multiple session cookies (e.g., one for user pages and one for admin pages) and (2) a session handler is set to `DatabaseHandler`, `MemcachedHandler`, or `RedisHandler`, then if an attacker gets one session cookie (e.g., one for user pages), they may be able to access pages that require another session cookie (e.g., for admin pages). This issue has been patched, please u

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-287
Published	2022-12-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: codeigniter

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-22 19:15 UTCPublished CVE record published
2026-06-17 05:11 UTCUpdated Record last modified

codeigniter codeigniter UPGRADE

Affected: >= 4.0.0 and < 4.2.11

Fixed in: 4.2.11

Safe to downgrade to: a release before 4.0.0

1. Check installed version

apt-cache policy codeigniter || rpm -q codeigniter || codeigniter --version

2. UPGRADE to 4.2.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade codeigniter

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade codeigniter

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison codeigniter sudo apt install codeigniter=<VERSION_BEFORE_4.0.0> sudo apt-mark hold codeigniter

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list codeigniter sudo dnf downgrade codeigniter-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add codeigniter

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-46170?

codeigniter: upgrade to 4.2.11. Exact commands for each OS are on this page.

Is CVE-2022-46170 being exploited?

CVE-2022-46170 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-46170 affect?

CVE-2022-46170 affects codeigniter. Severity is high (CVSS 8.6). CodeIgniter is a PHP full-stack web framework. When an application uses (1) multiple session cookies (e.g., one for user pages and one for admin pages) and (2) a session handler is set to `DatabaseHandler`, `MemcachedHandler`, or `RedisHan

How urgent is CVE-2022-46170?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-54418 CRITICAL 9.8 UPGRADE CodeIgniter is a PHP full-stack web framework
CVE-2024-41344 HIGH 7.5 DOWNGRADE A Cross-Site Request Forgery (CSRF) in Codeigniter 3.1.13 allows attackers to arbitrarily change the Administr
CVE-2024-29904 HIGH 7.5 UPGRADE CodeIgniter is a PHP full-stack web framework A vulnerability was found in the Language class that allowed DoS
CVE-2023-46240 HIGH 7.5 UPGRADE CodeIgniter is a PHP full-stack web framework
CVE-2023-32692 CRITICAL 9.8 UPGRADE CodeIgniter is a PHP full-stack web framework

References

← Back to latest CVEs