CVE-2026-9053

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Summary

CVECVE-2026-9053
StatePUBLISHED
Assigner9front
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-22 04:16:28 UTC
Updated2026-05-22 04:16:28 UTC
DescriptionMothra 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.

Risk And Classification

Primary CVSS: v4.0 6.9 MEDIUM from 1d66c9f9-fff2-411a-aa19-ca6312fa25e9

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

EPSS: 0.000550000 probability, percentile 0.175530000 (date 2026-05-28)

Problem Types: CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
4.01d66c9f9-fff2-411a-aa19-ca6312fa25e9Secondary6.9MEDIUMCVSS: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/C...
4.0CNACVSS6.9MEDIUMCVSS: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/A...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
None
Sub Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA 9front 9front affected f04e113279274526a8dae34de373027b68921fbf d145acc9ef0da47131af6ad94e87264e04870d47 git x86, 32 bit, 64 bit

References

ReferenceSourceLinkTags
git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/co... 1d66c9f9-fff2-411a-aa19-ca6312fa25e9 git.9front.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kristo (en)

CNA: Kristo (en)

CNA: Jacob Moody (en)

CNA: Kristo (en)

CNA: cinap_lenrek (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-10T18:00:00.000ZInitial private disclosure
CNA2026-05-11T18:18:00.000ZFix committed
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