Apache CloudStack up to 4.20.3.0/4.22.1.0 UI encoding error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.7$0-$5k0.99

Summaryinfo

A vulnerability was found in Apache CloudStack up to 4.20.3.0/4.22.1.0 and classified as very critical. This impacts an unknown function of the component UI. The manipulation results in encoding error. This vulnerability is reported as CVE-2026-61398. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Apache CloudStack up to 4.20.3.0/4.22.1.0. It has been classified as very critical. Affected is an unknown code of the component UI. The manipulation with an unknown input leads to a encoding error vulnerability. CWE is classifying the issue as CWE-172. The product does not properly encode or decode the data, resulting in unexpected values. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI while using Instance Reset Password functionality. This issue affects Apache CloudStack: from 4.15.1.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

The advisory is available at lists.apache.org. This vulnerability is traded as CVE-2026-61398 since 07/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/21/2026).

Upgrading to version 4.20.3.1 or 4.22.1.1 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.7

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Encoding error
CWE: CWE-172
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: CloudStack 4.20.3.1/4.22.1.1

Timelineinfo

07/09/2026 CVE reserved
08/21/2026 +43 days Advisory disclosed
08/21/2026 +0 days VulDB entry created
08/21/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Status: Confirmed

CVE: CVE-2026-61398 (🔒)
GCVE (CVE): GCVE-0-2026-61398
GCVE (VulDB): GCVE-100-394062

Entryinfo

Created: 08/21/2026 10:52
Changes: 08/21/2026 10:52 (55)
Complete: 🔍
Cache ID: 216::103

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