# RHSA-2020:0111: firefox security update

RHSA-2020:0111, released January 14, 2020, fixes 5 CVEs in firefox (version 0:68.4.1-1.el8_1). One of them is being exploited (CVE-2019-17026); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2020-0111
- Platform: Linux
- Released: Jan 14, 2020
- Priority: Patch now (Closes CVE-2019-17026, exploited (CISA KEV))
- CVEs: 5, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://access.redhat.com/errata/RHSA-2020:0111

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | RHEL 8 | 0:68.4.1-1.el8_1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2019-17026](https://patchblox.com/security/data/cve/CVE-2019-17026.md) | Patch now | Mozilla Firefox And Thunderbird Type Confusion Vulnerability | 8.8 | 0.4631 | CISA KEV |
| [CVE-2019-17017](https://patchblox.com/security/data/cve/CVE-2019-17017.md) | Urgent | Firefox ESR: Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in… | 8.8 | 0.0249 |  |
| [CVE-2019-17024](https://patchblox.com/security/data/cve/CVE-2019-17024.md) | Urgent | Firefox ESR: Mozilla developers reported memory safety bugs present in Firefox 71 and Firefox ESR 68.3. | 8.8 | 0.0246 |  |
| [CVE-2019-17016](https://patchblox.com/security/data/cve/CVE-2019-17016.md) | Urgent | Firefox ESR: When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly… | 6.1 | 0.0199 |  |
| [CVE-2019-17022](https://patchblox.com/security/data/cve/CVE-2019-17022.md) | Urgent | Firefox ESR: When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not… | 6.1 | 0.0199 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo