CVE-2026-71502Public exploitNetwork attack vector

Unauthenticated stored XSS via Vue template compilation

Published Aug 6, 2026 · Updated Aug 6, 2026

Stored cross-site scripting in MISP Project CTI-Transmute 1.5.0 and earlier allows remote attackers to run JavaScript in viewers' sessions. Jinja escapes conversion names and descriptions as HTML, but Vue recompiles them inside mounted DOM regions and evaluates embedded [[ ... ]] expressions. An anonymous public conversion supplies the stored payload; execution requires another user to open an affected page and exposes that user's application data and session-authorized actions.

CVSS severity5.1
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in MISP Project CTI-Transmute 1.5.0 and earlier allows remote attackers to run JavaScript in viewers' sessions. Jinja escapes conversion names and descriptions as HTML, but Vue recompiles them inside mounted DOM regions and evaluates embedded [[ ... ]] expressions. An anonymous public conversion supplies the stored payload; execution requires another user to open an affected page and exposes that user's application data and session-authorized actions.

The record

CVE
CVE-2026-71502
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
MISP Project
Product
CTI-Transmute
Classifications
CWE-1336, CWE-79, CAPEC-63, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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 <=1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MISP Project · CTI-Transmuteversion=0 <=1.5.0

Published CVSS scores

5.1CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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 exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1190Exploit Public-Facing Application

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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