bad reuse of HTTP Negotiate connection
CVE-2026-1965 is fixed in 11 products on 1 platform, first by curl 7.68.0-1ubuntu2.25+esm3, released March 11, 2026. It is not reported as exploited. Patch Radar priority: High.
The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP. Security Fix(es): * curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication (CVE-2026-1965) * curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect (CVE-2026-3783) * curl: curl: Man-in-the-middle attack via SSH host key bypass (CVE-2026-9547) * curl: curl: Insecure connection establishment due to TLS configuration mismatch (CVE-2026-8286) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| curl · Debian 13.5 (trixie) | 8.14.1-2+deb13u4 | DEBIAN-CVE-2026-1965 | Mar 11, 2026 |
| curl · Debian 14 | 8.19.0~rc3-1 | DEBIAN-CVE-2026-1965 | Mar 11, 2026 |
| curl · RHEL 10 | 8.12.1-1.el10_0.10 | RHSA-2026:72506 | Jul 3, 2026 |
| curl · RHEL 9 | 0:7.76.1-40.el9_8.5 | RHSA-2026:55439 | Aug 19, 2026 |
| curl · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm3 | curl 7.68.0-1ubuntu2.25+esm3 | Mar 11, 2026 |
| curl · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.23 | curl 7.81.0-1ubuntu1.23 | Mar 11, 2026 |
| curl · Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.8 | curl 8.5.0-2ubuntu10.8 | Mar 11, 2026 |
| curl · Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.2 | curl 8.14.1-2ubuntu1.2 | Mar 11, 2026 |
| curl · Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2 | curl 8.18.0-1ubuntu2 | Mar 11, 2026 |
| curl · almalinux 9 | 7.76.1-40.el9_8.5 | ALSA-2026:55439 | Aug 17, 2026 |
| curl · ol 10 | 0:8.12.1-4.el10_2.4 | ELSA-2026-55450 | Aug 17, 2026 |
| curl · ol 9 | 0:7.76.1-40.el9_8.5 | ELSA-2026-55439 | Aug 17, 2026 |
| curl · opensuse-leap 15.6 | 8.14.1-150600.4.40.1 | SUSE-SU-2026:0885-1 | Mar 12, 2026 |
| curl · opensuse-leap 16.0 | 8.14.1-160000.5.1 | OPENSUSE-SU-2026:20404-1 | Mar 20, 2026 |
| curl · rocky 9 | 0:7.76.1-40.el9_8.5 | RLSA-2026:55439 | Aug 17, 2026 |
| curl · sles 15.6 | 8.14.1-150600.4.40.1 | SUSE-SU-2026:0885-1 | Mar 12, 2026 |
| curl · sles 15.7 | 8.14.1-150700.7.14.1 | SUSE-SU-2026:0903-1 | Mar 17, 2026 |
| curl · sles 16.0 | 8.14.1-160000.5.1 | SUSE-SU-2026:20918-1 | Mar 20, 2026 |
| curl-mini · sles 16.0 | 8.14.1-160000.5.1 | SUSE-SU-2026:20918-1 | Mar 20, 2026 |
| curl-minimal · RHEL 9 | 0:7.76.1-40.el9_8.5 | RHSA-2026:55439 | Aug 19, 2026 |
| curl-minimal · almalinux 9 | 7.76.1-40.el9_8.5 | ALSA-2026:55439 | Aug 17, 2026 |
| curl-minimal · ol 9 | 0:7.76.1-40.el9_8.5 | ELSA-2026-55439 | Aug 17, 2026 |
| libcurl · RHEL 9 | 0:7.76.1-40.el9_8.5 | RHSA-2026:55439 | Aug 19, 2026 |
| libcurl · almalinux 9 | 7.76.1-40.el9_8.5 | ALSA-2026:55439 | Aug 17, 2026 |
| libcurl · ol 10 | 0:8.12.1-4.el10_2.4 | ELSA-2026-55450 | Aug 17, 2026 |
| libcurl · ol 9 | 0:7.76.1-40.el9_8.5 | ELSA-2026-55439 | Aug 17, 2026 |
| libcurl-devel · RHEL 9 | 0:7.76.1-40.el9_8.5 | RHSA-2026:55439 | Aug 19, 2026 |
| libcurl-devel · almalinux 9 | 7.76.1-40.el9_8.5 | ALSA-2026:55439 | Aug 17, 2026 |
| libcurl-devel · ol 10 | 0:8.12.1-4.el10_2.4 | ELSA-2026-55450 | Aug 17, 2026 |
| libcurl-devel · ol 9 | 0:7.76.1-40.el9_8.5 | ELSA-2026-55439 | Aug 17, 2026 |
| libcurl-minimal · RHEL 9 | 0:7.76.1-40.el9_8.5 | RHSA-2026:55439 | Aug 19, 2026 |
| libcurl-minimal · almalinux 9 | 7.76.1-40.el9_8.5 | ALSA-2026:55439 | Aug 17, 2026 |
| libcurl-minimal · ol 10 | 0:8.12.1-4.el10_2.4 | ELSA-2026-55450 | Aug 17, 2026 |
| libcurl-minimal · ol 9 | 0:7.76.1-40.el9_8.5 | ELSA-2026-55439 | Aug 17, 2026 |
| libcurl3-gnutls · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm3 | libcurl3-gnutls 7.68.0-1ubuntu2.25+esm3 | Mar 11, 2026 |
| libcurl3-gnutls · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.23 | libcurl3-gnutls 7.81.0-1ubuntu1.23 | Mar 11, 2026 |
| libcurl3-nss · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm3 | libcurl3-nss 7.68.0-1ubuntu2.25+esm3 | Mar 11, 2026 |
| libcurl3-nss · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.23 | libcurl3-nss 7.81.0-1ubuntu1.23 | Mar 11, 2026 |
| libcurl3t64-gnutls · Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.8 | libcurl3t64-gnutls 8.5.0-2ubuntu10.8 | Mar 11, 2026 |
| libcurl3t64-gnutls · Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.2 | libcurl3t64-gnutls 8.14.1-2ubuntu1.2 | Mar 11, 2026 |
| libcurl3t64-gnutls · Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2 | libcurl3t64-gnutls 8.18.0-1ubuntu2 | Mar 11, 2026 |
| libcurl4 · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm3 | libcurl4 7.68.0-1ubuntu2.25+esm3 | Mar 11, 2026 |
| libcurl4 · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.23 | libcurl4 7.81.0-1ubuntu1.23 | Mar 11, 2026 |
| libcurl4t64 · Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.8 | libcurl4t64 8.5.0-2ubuntu10.8 | Mar 11, 2026 |
| libcurl4t64 · Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.2 | libcurl4t64 8.14.1-2ubuntu1.2 | Mar 11, 2026 |
| libcurl4t64 · Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2 | libcurl4t64 8.18.0-1ubuntu2 | Mar 11, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
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.