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Vulnerability Details :

CVE-2026-9053

Summary
Assigner-9front
Assigner Org ID-1d66c9f9-fff2-411a-aa19-ca6312fa25e9
Published At-22 May, 2026 | 02:57
Updated At-22 May, 2026 | 12:36
Rejected At-
Credits

Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website with a malicious default file path, and then conceal this form element.

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:9front
Assigner Org ID:1d66c9f9-fff2-411a-aa19-ca6312fa25e9
Published At:22 May, 2026 | 02:57
Updated At:22 May, 2026 | 12:36
Rejected At:
▼CVE Numbering Authority (CNA)

Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website with a malicious default file path, and then conceal this form element.

Affected Products
Vendor
9front
Product
9front
Package Name
mothra
Repo
https://git.9front.org/plan9front/9front/HEAD/info.html
Modules
  • mothra
Program Files
  • /sys/src/cmd/mothra/forms.c
Program Routines
  • rdform()
Platforms
  • x86
  • 32 bit
  • 64 bit
Default Status
unaffected
Versions
Affected
  • From f04e113279274526a8dae34de373027b68921fbf before d145acc9ef0da47131af6ad94e87264e04870d47 (git)
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P/AU:N/R:A/RE:L/U:Amber
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P/AU:N/R:A/RE:L/U:Amber
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Kristo
reporter
Kristo
coordinator
Jacob Moody
remediation developer
Kristo
remediation developer
cinap_lenrek
Timeline
EventDate
Initial private disclosure2026-05-10 18:00:00
Fix committed2026-05-11 18:18:00
Event: Initial private disclosure
Date: 2026-05-10 18:00:00
Event: Fix committed
Date: 2026-05-11 18:18:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html
mitigation
Hyperlink: https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html
Resource:
mitigation
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-434CWE-434 Unrestricted Upload of File with Dangerous Type
Type: CWE
CWE ID: CWE-434
Description: CWE-434 Unrestricted Upload of File with Dangerous Type
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:1d66c9f9-fff2-411a-aa19-ca6312fa25e9
Published At:22 May, 2026 | 04:16
Updated At:22 May, 2026 | 04:16

Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website with a malicious default file path, and then conceal this form element.

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
Secondary4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:X/RE:L/U:Amber
Type: Secondary
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:X/RE:L/U:Amber
CPE Matches
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html1d66c9f9-fff2-411a-aa19-ca6312fa25e9
N/A
Hyperlink: https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html
Source: 1d66c9f9-fff2-411a-aa19-ca6312fa25e9
Resource: N/A

Change History

0
Information is not available yet

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