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CVE-2022-26485 is a use-after-free vulnerability in Mozilla's XSLT parameter processing. The flaw is triggered when an XSLT parameter is removed during processing, resulting in stale memory being referenced after it has been freed. In affected Mozilla products, this memory-safety error could be made exploitable and was reported as being abused in the wild. The issue affects Firefox before 97.0.2, Firefox ESR before 91.6.1, Firefox for Android before 97.3.0, Thunderbird before 91.6.2, and Focus before 97.3.0.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept exploit for CVE-2022-26485, a use-after-free vulnerability in Mozilla Firefox (tested on version 78.0 for Windows). The repository consists of two files: a README.md, which provides a brief description and a download link to the specific Firefox version, and exploit.html, which contains the exploit code. The exploit is implemented in JavaScript within an HTML file and leverages XSLTProcessor and crafted XML/XSLT data to trigger the vulnerability. Through manipulation of ArrayBuffers and object properties, the exploit achieves arbitrary memory read and write capabilities in the browser process. This can be used as a foundation for further exploitation, such as executing arbitrary code or escaping the browser sandbox. The exploit is intended to be opened in the vulnerable Firefox browser. No external network endpoints are contacted by the exploit itself, but the README provides a direct link to the Firefox installer for testing. The code is a proof-of-concept and does not include a weaponized or fully automated payload.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.