CVE-2026-3783
Fixed in a distro release EPSS <1%CVSS 5.3
When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a redirect to a second URL, curl could leak that token to the second hostname under some circumstances. If the hostname that the first request is redirected to has information in the used .netrc file, with either of the `machine` or `default` keywords, curl would pass on the bearer token set for the first host also to the second one.
Products: curl
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 9 | curl | 7.76.1-40.el9_8.5 |
| AlmaLinux 9 | curl-minimal | 7.76.1-40.el9_8.5 |
| AlmaLinux 9 | libcurl | 7.76.1-40.el9_8.5 |
| AlmaLinux 9 | libcurl-devel | 7.76.1-40.el9_8.5 |
| AlmaLinux 9 | libcurl-minimal | 7.76.1-40.el9_8.5 |
| Alpine 3.21 | curl | 8.14.1-r3 |
| Alpine 3.22 | curl | 8.14.1-r4 |
| Alpine 3.23 | curl | 8.19.0-r0 |
| Alpine 3.24 | curl | 8.19.0-r0 |
| Chainguard | libcurl4 | no fix |
| Debian 12 | curl | 7.88.1-10+deb12u15 |
| Debian 13 | curl | 8.14.1-2+deb13u4 |
| Debian 14 | curl | 8.19.0-1 |
| Red Hat Enterprise Linux 10.2 | curl | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | curl-debuginfo | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | curl-debugsource | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | libcurl | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | libcurl-debuginfo | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | libcurl-devel | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | libcurl-minimal | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 10.2 | libcurl-minimal-debuginfo | 0:8.12.1-4.el10_2.3 |
| Red Hat Enterprise Linux 9 | curl | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | curl-debuginfo | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | curl-debugsource | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | curl-minimal | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | curl-minimal-debuginfo | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | libcurl | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | libcurl-debuginfo | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | libcurl-devel | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | libcurl-minimal | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux 9 | libcurl-minimal-debuginfo | 0:7.76.1-40.el9_8.5 |
| Red Hat Enterprise Linux eus 10.0 | curl | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | curl-debuginfo | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | curl-debugsource | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-debuginfo | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-devel | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-minimal | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-minimal-debuginfo | 0:8.12.1-1.el10_0.10 |
| Red Hat hummingbird 1 | curl | 0:8.22.0-1.1.hum1 |
| Red Hat hummingbird 1 | curl | 0:8.19.0-3.hum1 |
| Red Hat hummingbird 1 | curl | 0:8.19.0-3.1.hum1 |
| Red Hat hummingbird 1 | libcurl | 0:8.19.0-3.hum1 |
| Red Hat hummingbird 1 | libcurl | 0:8.22.0-1.1.hum1 |
| Red Hat hummingbird 1 | libcurl | 0:8.19.0-3.1.hum1 |
| Red Hat hummingbird 1 | libcurl-devel | 0:8.19.0-3.hum1 |
| Red Hat hummingbird 1 | libcurl-devel | 0:8.22.0-1.1.hum1 |
| Red Hat hummingbird 1 | libcurl-devel | 0:8.19.0-3.1.hum1 |
| Red Hat hummingbird 1 | libcurl-minimal | 0:8.19.0-3.1.hum1 |
| Red Hat hummingbird 1 | libcurl-minimal | 0:8.19.0-3.hum1 |
| Red Hat hummingbird 1 | libcurl-minimal | 0:8.22.0-1.1.hum1 |
| Rocky Linux 9 | curl | 0:7.76.1-40.el9_8.5 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Micro 5.2 | curl | 8.14.1-150200.4.103.1 |
| SUSE Linux Enterprise Micro 5.3 | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Micro 5.4 | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Micro 5.5 | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | curl | 8.14.1-150700.7.14.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | curl | 8.0.1-11.120.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | curl | 8.14.1-150400.5.80.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | curl | 8.14.1-150600.4.40.1 |
| SUSE Linux Enterprise Server 16.0 | curl | 8.14.1-160000.5.1 |
| SUSE Linux Enterprise Server 16.0 | curl-mini | 8.14.1-160000.5.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | curl | 8.0.1-11.120.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | curl | 8.14.1-150600.4.40.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | curl | 8.14.1-160000.5.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | curl-mini | 8.14.1-160000.5.1 |
| SUSE Linux Micro 6.0 | curl | 8.14.1-5.1 |
| SUSE Linux Micro 6.1 | curl | 8.14.1-slfo.1.1_6.1 |
| SUSE Linux Micro 6.2 | curl | 8.14.1-160000.5.1 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.23 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.8 |
| Ubuntu 25.10 | curl | 8.14.1-2ubuntu1.2 |
| Ubuntu 26.04 LTS | curl | 8.18.0-1ubuntu2 |
| Ubuntu 26.10 | curl | 8.18.0-1ubuntu2 |
| Ubuntu Pro 18.04 LTS | curl | 7.58.0-2ubuntu3.24+esm8 |
| Ubuntu Pro 20.04 LTS | curl | 7.68.0-1ubuntu2.25+esm3 |
| Wolfi | libcurl4 | no fix |
| openSUSE Leap 15.6 | curl | 8.14.1-150600.4.40.1 |
| openSUSE Leap 16.0 | curl | 8.14.1-160000.5.1 |
| openSUSE Tumbleweed | curl | 8.19.0-1.1 |