# libcurl4t64 8.18.0-1ubuntu2.8: libcurl4t64 8.18.0-1ubuntu2.8 for Ubuntu 26.04.1 LTS (resolute)

libcurl4t64 8.18.0-1ubuntu2.8, released November 7, 2026, fixes 18 CVEs in libcurl4t64. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-resolute-libcurl4t64-8.18.0-1ubuntu2.8
- Platform: Linux
- Released: Nov 7, 2026
- Priority: Urgent (Closes CVE-2026-92388, rated Critical)
- CVEs: 18, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libcurl4t64](https://patchblox.com/security/data/product/linux/libcurl4t64.md) | Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-92388](https://patchblox.com/security/data/cve/CVE-2026-92388.md) | Urgent | FTP wildcard write callback mixup | 9.1 | 0.0070 |  |
| [CVE-2026-92392](https://patchblox.com/security/data/cve/CVE-2026-92392.md) | High | HTTP/2 upload Use-After-Free | 8.1 | 0.0128 |  |
| [CVE-2026-86409](https://patchblox.com/security/data/cve/CVE-2026-86409.md) | High | stale SigV4 headers sent unintended | 8.1 | 0.0110 |  |
| [CVE-2026-87864](https://patchblox.com/security/data/cve/CVE-2026-87864.md) | High | IMAP APPEND plus CRLF conversion command injection | 8.2 | 0.0083 |  |
| [CVE-2026-86414](https://patchblox.com/security/data/cve/CVE-2026-86414.md) | High | leaking host credentials to HTTP proxy | 7.5 | 0.0068 |  |
| [CVE-2026-107929](https://patchblox.com/security/data/cve/CVE-2026-107929.md) | High | local interface connection reuse mixup | 8.1 | 0.0067 |  |
| [CVE-2026-92391](https://patchblox.com/security/data/cve/CVE-2026-92391.md) | Routine | curl_mime_free stack overflow by recursion | 5.5 | 0.0117 |  |
| [CVE-2026-92387](https://patchblox.com/security/data/cve/CVE-2026-92387.md) | Routine | never-ending loop via server response omission | 5.3 | 0.0105 |  |
| [CVE-2026-87862](https://patchblox.com/security/data/cve/CVE-2026-87862.md) | Routine | HSTS cache import drops longer-lived child | 4.8 | 0.0100 |  |
| [CVE-2026-87863](https://patchblox.com/security/data/cve/CVE-2026-87863.md) | Routine | HSTS response erases persisted entries | 6.5 | 0.0083 |  |
| [CVE-2026-92386](https://patchblox.com/security/data/cve/CVE-2026-92386.md) | Routine | server-set cookie aborts cookie jar load | 3.7 | 0.0083 |  |
| [CVE-2026-86412](https://patchblox.com/security/data/cve/CVE-2026-86412.md) | Routine | server-set cookie erases cookie jar | 3.3 | 0.0083 |  |
| [CVE-2026-86410](https://patchblox.com/security/data/cve/CVE-2026-86410.md) | Routine | redirect to SFTP or SCP bypasses host verification | 5.9 | 0.0077 |  |
| [CVE-2026-92389](https://patchblox.com/security/data/cve/CVE-2026-92389.md) | Routine | TFTP direction confusion | 5.9 | 0.0072 |  |
| [CVE-2026-107928](https://patchblox.com/security/data/cve/CVE-2026-107928.md) | Routine | info leak uploading over WebSockets with GnuTLS | 3.7 | 0.0071 |  |
| [CVE-2026-87865](https://patchblox.com/security/data/cve/CVE-2026-87865.md) | Routine | knownhost callback mismatches key as missing | 6.8 | 0.0060 |  |
| [CVE-2026-92390](https://patchblox.com/security/data/cve/CVE-2026-92390.md) | Routine | -J no-clobber guarantee bypassed with 103 early hints | 6.5 | 0.0059 |  |
| [CVE-2026-94266](https://patchblox.com/security/data/cve/CVE-2026-94266.md) | Routine | password leak in CURLINFO_EFFECTIVE_URL | 5.9 | 0.0056 |  |

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Data as of 2026-11-12T19:57:06Z 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

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