CVE-2026-78289Network attack vectorHinoki check available

Unauthenticated reflected script execution

Published Aug 27, 2026 · Updated Aug 27, 2026

Reflected XSS in Loft.Ocean CozyStay 1.10.0 and earlier allows remote attackers to execute script via an unspecified input. Published material does not identify the affected request handler or parameter, or explain how attacker-controlled input reaches a response without output encoding. Exploitation requires a site visitor to follow a crafted request; script runs in that visitor's browser context and can act with that session's privileges.

CVSS severity7.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected XSS in Loft.Ocean CozyStay 1.10.0 and earlier allows remote attackers to execute script via an unspecified input. Published material does not identify the affected request handler or parameter, or explain how attacker-controlled input reaches a response without output encoding. Exploitation requires a site visitor to follow a crafted request; script runs in that visitor's browser context and can act with that session's privileges.

The record

CVE
CVE-2026-78289
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Loft.Ocean
Product
CozyStay
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=1.10.0 changes=[{"at":"1.10.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Loft.Ocean · CozyStayversion=n/a <=1.10.0 changes=[{"at":"1.10.1","status":"unaffected"}]

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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