# libjavascriptcoregtk-bin 2.52.3-0ubuntu0.26.04.2: libjavascriptcoregtk-bin 2.52.3-0ubuntu0.26.04.2 for Ubuntu 26.04.1 LTS (resolute)

libjavascriptcoregtk-bin 2.52.3-0ubuntu0.26.04.2, released March 24, 2026, fixes 8 CVEs in libjavascriptcoregtk-bin. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-resolute-libjavascriptcoregtk-bin-2.52.3-0ubuntu0.26.04.2
- Platform: Linux
- Released: Mar 24, 2026
- Priority: High (Closes CVE-2026-20664, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libjavascriptcoregtk-bin](https://patchblox.com/security/data/product/linux/libjavascriptcoregtk-bin.md) | Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-20664](https://patchblox.com/security/data/cve/CVE-2026-20664.md) | High | WebKit: Processing maliciously crafted web content may lead to an unexpected process crash | 8.8 | 0.0077 |  |
| [CVE-2026-28857](https://patchblox.com/security/data/cve/CVE-2026-28857.md) | High | webkit2gtk3: processing maliciously crafted web content may lead to an unexpected process crash (bsc#1261176). | 8.8 | 0.0069 |  |
| [CVE-2026-28859](https://patchblox.com/security/data/cve/CVE-2026-28859.md) | High | WebKit: A malicious website may be able to process restricted web content outside the sandbox | 8.8 | 0.0068 |  |
| [CVE-2026-20665](https://patchblox.com/security/data/cve/CVE-2026-20665.md) | High | WebKit: Processing maliciously crafted web content may prevent Content Security Policy from being enforced | 8.8 | 0.0065 |  |
| [CVE-2026-20643](https://patchblox.com/security/data/cve/CVE-2026-20643.md) | High | WebKit: Processing maliciously crafted web content may bypass Same Origin Policy | 8.8 | 0.0037 |  |
| [CVE-2026-20691](https://patchblox.com/security/data/cve/CVE-2026-20691.md) | High | WebKit Sandboxing: A maliciously crafted webpage may be able to fingerprint the user | 8.8 | 0.0029 |  |
| [CVE-2026-28871](https://patchblox.com/security/data/cve/CVE-2026-28871.md) | High | WebKit: Visiting a maliciously crafted website may lead to a cross-site scripting attack | 8.8 | 0.0029 |  |
| [CVE-2026-28861](https://patchblox.com/security/data/cve/CVE-2026-28861.md) | Routine | WebKit: A malicious website may be able to access script message handlers intended for other origins | 4.3 | 0.0033 |  |

---

Data as of 2026-11-12T07:53:35Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.