CVE-2026-79294Public exploitNetwork attack vector

Session theft via unsanitized shared HTML previews

Published Sep 18, 2026 · Updated Sep 18, 2026

Stored cross-site scripting in Moonshot AI Kimi 1.0 allows remote authenticated users to steal victim sessions through shared HTML previews. The HTML artifact Preview renders model-generated markup in Kimi's origin without neutralizing scripts, allowing access and refresh tokens to be read from localStorage. An ordinary attacker account must publish the artifact and a signed-in victim must open its public Share link, after which stolen tokens allow account takeover.

CVSS severity6.1
Medium
EPSS probability0.51%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Moonshot AI Kimi 1.0 allows remote authenticated users to steal victim sessions through shared HTML previews. The HTML artifact Preview renders model-generated markup in Kimi's origin without neutralizing scripts, allowing access and refresh tokens to be read from localStorage. An ordinary attacker account must publish the artifact and a signed-in victim must open its public Share link, after which stolen tokens allow account takeover.

The record

CVE
CVE-2026-79294
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1528, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1528Steal Application Access Token
T1189Drive-by Compromise

Public exploit references

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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