CVE-2022-26156: An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3

Routine

MEDIUM 6.1DOWNGRADE

CVE-2022-26156 is a medium-severity flaw (CVSS 6.1) affecting cherwell service management. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3. Injection of a malicious payload within the RelayState= parameter of the HTTP request body results in the hijacking of the form action. Form-action hijacking vulnerabilities arise when an application places user-supplied input into the action URL of an HTML form. An attacker can use this vulnerability to construct a URL that, if visited by another applicat

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-601
Published	2022-02-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cherwell

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

Am I affected?

Timeline

2022-02-28 16:15 UTCPublished CVE record published
2026-06-17 04:34 UTCUpdated Record last modified

cherwell cherwell service management DOWNGRADE

Affected: 10.2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.2.3

1. Check installed version

apt-cache policy cherwell-service-management || rpm -q cherwell-service-management || cherwell-service-management --version

2. No fixed release: DOWNGRADE to a release before 10.2.3 (Debian / Ubuntu)

apt-cache madison cherwell-service-management sudo apt install cherwell-service-management=<VERSION_BEFORE_10.2.3> sudo apt-mark hold cherwell-service-management

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cherwell-service-management sudo dnf downgrade cherwell-service-management-<VERSION_BEFORE_10.2.3> sudo dnf versionlock add cherwell-service-management

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-2022-26156?

cherwell service management: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-26156 being exploited?

CVE-2022-26156 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-2022-26156 affect?

CVE-2022-26156 affects cherwell service management. Severity is medium (CVSS 6.1). An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3. Injection of a malicious payload within the RelayState= parameter of the HTTP request body results in the hijacking of the form action. Form-action

How urgent is CVE-2022-26156?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2022-26158 MEDIUM 6.1 DOWNGRADE An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3
CVE-2022-26157 MEDIUM 5.3 DOWNGRADE An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3
CVE-2022-26155 MEDIUM 6.1 DOWNGRADE An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3

References

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