CVE-2026-64810Network attack vector

Silent activity tracking via notification HTML injection

Published Jul 23, 2026 · Updated Jul 23, 2026

HTML injection in JetBrains IntelliJ IDEA before 2026.2 allows remote attackers to silently track user activity through an IDE notification. JetBrains identifies the notification as the injection locus but has not disclosed which input is rendered or what HTML neutralization is missing. Exploitation requires user interaction and is limited to covert activity tracking, with no reported data modification or service interruption.

CVSS severity6.1
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in JetBrains IntelliJ IDEA before 2026.2 allows remote attackers to silently track user activity through an IDE notification. JetBrains identifies the notification as the injection locus but has not disclosed which input is rendered or what HTML neutralization is missing. Exploitation requires user interaction and is limited to covert activity tracking, with no reported data modification or service interruption.

The record

CVE
CVE-2026-64810
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
JetBrains
Product
IntelliJ IDEA
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 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=0 <2026.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JetBrains · IntelliJ IDEAversion=0 <2026.2

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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.

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')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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