CVE-2026-54705Public exploitNetwork attack vector

Cross-site scripting via unescaped text-mode content

Published Jul 29, 2026 · Updated Jul 29, 2026

Cross-site scripting in CortexJS MathLive before 0.110.0 allows attackers to execute JavaScript through crafted LaTeX text content. Box.toMarkup concatenates raw TextAtom values into HTML spans, while the MathML serializer emits text-mode atom values without complete XML escaping. The flaw is reachable only when an application renders attacker-controlled \text{} or \mbox{} expressions into the DOM, where injected markup executes in the page context.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in CortexJS MathLive before 0.110.0 allows attackers to execute JavaScript through crafted LaTeX text content. Box.toMarkup concatenates raw TextAtom values into HTML spans, while the MathML serializer emits text-mode atom values without complete XML escaping. The flaw is reachable only when an application renders attacker-controlled \text{} or \mbox{} expressions into the DOM, where injected markup executes in the page context.

The record

CVE
CVE-2026-54705
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
CortexJS
Product
MathLive
Classifications
CWE-116, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=< 0.110.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CortexJS · MathLiveversion=< 0.110.0

Published CVSS scores

6.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1059.007JavaScript/JScript

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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