netrc credential leak with reused proxy connection
CVE-2026-6429 is fixed in 10 products on 1 platform, first by curl 8.18.0-1ubuntu2.1, released April 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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: Proxy credential disclosure via redirects to unauthenticated proxies (CVE-2026-6253) * curl: libcurl: Authentication bypass due to incorrect HTTP Negotiate connection reuse (CVE-2026-5545) * curl: libcurl: Credential leak via reused proxy connection during HTTP redirects (CVE-2026-6429) * curl: libcurl: Information disclosure via incorrect Proxy-Authorization header reuse (CVE-2026-7168) * libcurl: libcurl: Use-after-free vulnerability leading to Denial of Service (CVE-2026-10536) 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-2026-6429 | May 15, 2026 |
| curl · Debian 14 | 8.20.0~rc3-1 | DEBIAN-CVE-2026-6429 | May 15, 2026 |
| curl · RHEL 10 | 8.12.1-4.el10_2.7 | RHSA-2026:80512 | Jul 3, 2026 |
| curl · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.24 | curl 7.81.0-1ubuntu1.24 | May 15, 2026 |
| curl · Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.9 | curl 8.5.0-2ubuntu10.9 | May 15, 2026 |
| curl · Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.3 | curl 8.14.1-2ubuntu1.3 | May 15, 2026 |
| curl · Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.1 | curl 8.18.0-1ubuntu2.1 | Apr 29, 2026 |
| curl · almalinux 10 | 8.12.1-4.el10_2.7 | ALSA-2026:80512 | Nov 7, 2026 |
| curl · ol 10 | 0:8.12.1-4.el10_2.7 | ELSA-2026-80512 | Nov 7, 2026 |
| curl · opensuse-leap 16.0 | 8.14.1-160000.6.1 | OPENSUSE-SU-2026:20973-1 | Jun 17, 2026 |
| curl · rocky 10 | 0:8.12.1-4.el10_2.7 | RLSA-2026:80512 | Nov 7, 2026 |
| curl · sles 15.7 | 8.14.1-150700.7.23.1 | SUSE-SU-2026:3798-1 | Aug 25, 2026 |
| curl · sles 16.0 | 8.14.1-160000.6.1 | SUSE-SU-2026:22156-1 | Jun 17, 2026 |
| curl-mini · sles 16.0 | 8.14.1-160000.6.1 | SUSE-SU-2026:22156-1 | Jun 17, 2026 |
| libcurl · almalinux 10 | 8.12.1-4.el10_2.7 | ALSA-2026:80512 | Nov 7, 2026 |
| libcurl · ol 10 | 0:8.12.1-4.el10_2.7 | ELSA-2026-80512 | Nov 7, 2026 |
| libcurl-devel · almalinux 10 | 8.12.1-4.el10_2.7 | ALSA-2026:80512 | Nov 7, 2026 |
| libcurl-devel · ol 10 | 0:8.12.1-4.el10_2.7 | ELSA-2026-80512 | Nov 7, 2026 |
| libcurl-minimal · almalinux 10 | 8.12.1-4.el10_2.7 | ALSA-2026:80512 | Nov 7, 2026 |
| libcurl-minimal · ol 10 | 0:8.12.1-4.el10_2.7 | ELSA-2026-80512 | Nov 7, 2026 |
| libcurl3-gnutls · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.24 | libcurl3-gnutls 7.81.0-1ubuntu1.24 | May 15, 2026 |
| libcurl3-nss · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.24 | libcurl3-nss 7.81.0-1ubuntu1.24 | May 15, 2026 |
| libcurl3t64-gnutls · Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.9 | libcurl3t64-gnutls 8.5.0-2ubuntu10.9 | May 15, 2026 |
| libcurl3t64-gnutls · Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.3 | libcurl3t64-gnutls 8.14.1-2ubuntu1.3 | May 15, 2026 |
| libcurl3t64-gnutls · Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.1 | libcurl3t64-gnutls 8.18.0-1ubuntu2.1 | Apr 29, 2026 |
| libcurl4 · Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.24 | libcurl4 7.81.0-1ubuntu1.24 | May 15, 2026 |
| libcurl4t64 · Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.9 | libcurl4t64 8.5.0-2ubuntu10.9 | May 15, 2026 |
| libcurl4t64 · Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.3 | libcurl4t64 8.14.1-2ubuntu1.3 | May 15, 2026 |
| libcurl4t64 · Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.1 | libcurl4t64 8.18.0-1ubuntu2.1 | Apr 29, 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.