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Vulnerability Details :

CVE-2026-42084

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-04 May, 2026 | 17:11
Updated At-06 May, 2026 | 13:39
Rejected At-
Credits

OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:04 May, 2026 | 17:11
Updated At:06 May, 2026 | 13:39
Rejected At:
▼CVE Numbering Authority (CNA)
OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.

Affected Products
Vendor
OpenC3
Product
cosmos
Versions
Affected
  • < 6.10.5
  • >= 7.0.0.pre.rc1, < 7.0.0-rc3
Problem Types
TypeCWE IDDescription
CWECWE-620CWE-620: Unverified Password Change
Type: CWE
CWE ID: CWE-620
Description: CWE-620: Unverified Password Change
Metrics
VersionBase scoreBase severityVector
3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
x_refsource_CONFIRM
https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776
x_refsource_MISC
https://github.com/OpenC3/cosmos/releases/tag/v6.10.5
x_refsource_MISC
https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
x_refsource_MISC
Hyperlink: https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776
Resource:
x_refsource_MISC
Hyperlink: https://github.com/OpenC3/cosmos/releases/tag/v6.10.5
Resource:
x_refsource_MISC
Hyperlink: https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
exploit
Hyperlink: https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:04 May, 2026 | 18:16
Updated At:08 May, 2026 | 19:54

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CPE Matches

openc3
openc3
>>cosmos>>Versions before 6.10.5(exclusive)
cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:*
openc3
openc3
>>cosmos>>7.0.0
cpe:2.3:a:openc3:cosmos:7.0.0:rc1:*:*:open_source:*:*:*
openc3
openc3
>>cosmos>>7.0.0
cpe:2.3:a:openc3:cosmos:7.0.0:rc2:*:*:open_source:*:*:*
Weaknesses
CWE IDTypeSource
CWE-620Secondarysecurity-advisories@github.com
CWE ID: CWE-620
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776security-advisories@github.com
Patch
https://github.com/OpenC3/cosmos/releases/tag/v6.10.5security-advisories@github.com
Release Notes
https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3security-advisories@github.com
Release Notes
https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7security-advisories@github.com
Exploit
Vendor Advisory
https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Hyperlink: https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/OpenC3/cosmos/releases/tag/v6.10.5
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory

Change History

0
Information is not available yet

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Details not found