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Vulnerabilities

Vulnerability · CVE-2025-45526

A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7.

Published Jun 17, 2025 · catalog updated Jun 26, 2025 · A denial of service

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-45526. EPSS is 0.14%. Act only if a listed version of A denial of service is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A denial of service).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Advisory link
Affected products
vendor asvd microlight 0 ≤0.0.7

A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CPU resources, causing browser crashes or unresponsiveness. An attacker can exploit this vulnerability by tricking a user into visiting a malicious web page containing a microlight element with large co

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor asvd microlight 0 ≤0.0.70 ≤0.0.7

How to fix CVE-2025-45526

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-45526. EPSS is 0.14%. Act only if a listed version of A denial of service is installed.

Which versions are affected?

Compare what you have installed with asvd microlight 0 ≤0.0.7 0 ≤0.0.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 17, 2025 · EUVD

    Detected

    A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CP

  2. Jun 26, 2025 · EUVD

    Updated

    A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CP

Sources

  • CVE.orgVulnerability recordCVE-2025-45526

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-45526

    30-day exploitation probability 0.14%

    first.org
  • EUVDVulnerability recordEUVD-2025-18559

    A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large c

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026