How severe is CVE-2022-26156?

CVE-2022-26156 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2022-26156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-26156?

CVE-2022-26156 affects Cherwell Cherwell Service Management. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-26156?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-26156 published?

CVE-2022-26156 was published on 2022-02-28 and last updated on 2026-06-17.

CVE-2022-26156

CVE-2022-26156 is a medium-severity vulnerability in Cherwell Cherwell Service Management with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Cherwell Cherwell Service Management
Published: 2022-02-28
Last modified: 2026-06-17

Description

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 application user, will modify the action URL of a form to point to the attacker's server.

Frequently asked questions

What is CVE-2022-26156?: 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 application user, will modify the action URL of a form to point to the attacker's server.
How severe is CVE-2022-26156?: CVE-2022-26156 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2022-26156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-26156?: CVE-2022-26156 affects Cherwell Cherwell Service Management. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-26156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-26156 published?: CVE-2022-26156 was published on 2022-02-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cherwell:cherwell_service_management:10.2.3:*:*:*:*:*:*:*

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CVE-2022-26158 — Medium (CVSS 6.1): An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3. It accepts and reflects…
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