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 content, resulting in a denial of service. NOTE: this is disputed by multiple parties because a large amount of memory and CPU resources is expected to be needed for content of that size.
Metrics
Affected Vendors & Products
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Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2025-18559 | Withdrawn Advisory: microlight allows a denial of service |
 Github GHSA |
GHSA-wgc6-9f6w-h8hx | Withdrawn Advisory: microlight allows a denial of service |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 26 Jun 2025 16:15:00 +0000
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| Metrics |
ssvc
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Wed, 18 Jun 2025 18:45:00 +0000
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| Description | 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 content, resulting in a denial of service. | 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 content, resulting in a denial of service. NOTE: this is disputed by multiple parties because a large amount of memory and CPU resources is expected to be needed for content of that size. |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Tue, 17 Jun 2025 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 content, resulting in a denial of service. | |
| References |
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2025-06-26T16:10:51.373Z
Reserved: 2025-04-22T00:00:00.000Z
Link: CVE-2025-45526
Vulnrichment
Updated: 2025-06-26T16:10:41.760Z
NVD
Status : Awaiting Analysis
Published: 2025-06-17T20:15:32.243
Modified: 2025-06-26T16:15:29.013
Link: CVE-2025-45526
Redhat
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OpenCVE Enrichment
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