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Axios is a promise-based HTTP client for the browser and Node.js. From 1.16.1 until 1.20.0, the RFC 2397 regular expression allows slash characters on both sides of the media-type separator. An application passes an attacker-controlled malformed data URL containing many slash characters and no comma. the JavaScript regular-expression engine explores many separator placements before rejecting the URL. Synchronous excessive backtracking can block the Node.js event loop and cause denial of service. The affected identifiers are fromDataURI, DATA_URL_PATTERN, data:. This issue is fixed in version 1.20.0.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Atlassian Jira | — | Upgrade to the latest version of Atlassian JIRA | Oct 21, 2026 | Oct 20, 2026 |
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