Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| curl | curl | 7.33.0 – < 8.14.2, 8.15.0 – < 8.16.1, 8.17.0 – < 8.19.0, 8.18.0, 8.17.0, 8.16.0, 8.15.0, 8.14.1, 8.14.0, 8.13.0, 8.12.1, 8.12.0, 8.11.1, 8.11.0, 8.10.1, 8.10.0, 8.9.1, 8.9.0, 8.8.0, 8.7.1, 8.7.0, 8.6.0, 8.5.0, 8.4.0, 8.3.0, 8.2.1, 8.2.0, 8.1.2, 8.1.1, 8.1.0, 8.0.1, 8.0.0, 7.88.1, 7.88.0, 7.87.0, 7.… | 8.14.2 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | curl | 8.19.0-1 | — |
| Debian 13 | curl | 8.14.1-2+deb13u4 | — |
| Debian 12 | curl | 7.88.1-10+deb12u15 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | curl | 8.18.0-1ubuntu2 | — |
| Ubuntu 26.04 LTS | curl | 8.18.0-1ubuntu2 | — |
| Ubuntu 25.10 | curl | 8.14.1-2ubuntu1.2 | USN-8084-1 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.8 | USN-8084-1 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.23 | USN-8084-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | curl | 7.68.0-1ubuntu2.25+esm3 | USN-8099-1 |
| Ubuntu Pro 18.04 LTS | curl | 7.58.0-2ubuntu3.24+esm8 | USN-8099-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | curl +3 | 8.12.1-4.el10_2.3 | RHSA-2026:55450 |
| RHEL 9 | curl +4 | 7.76.1-40.el9_8.5 | RHSA-2026:55439 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | curl +3 | 8.12.1-1.el10_0.10 | RHSA-2026:72506 |
| Red Hat Hardened Images 1 | curl +3 | 8.19.0-3.hum1 | RHSA-2026:77255, RHSA-2026:7432, RHSA-2026:6893 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | curl +4 | 7.76.1-40.el9_8.5 | ALSA-2026:55439 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | curl | 7.76.1-40.el9_8.5 | RLSA-2026:55439 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | curl | 8.14.1-150700.7.14.1 | SUSE-SU-2026:0903-1 |
| SLES 15 SP6 | curl | 8.14.1-150600.4.40.1 | SUSE-SU-2026:0885-1 |
| SLES 15 SP5 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SLES 15 SP4 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SLES 12 SP5 | curl | 8.0.1-11.120.1 | SUSE-SU-2026:0921-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | curl +1 | 8.14.1-160000.5.1 | SUSE-SU-2026:20918-1 |
| SLES for SAP 15 SP6 | curl | 8.14.1-150600.4.40.1 | SUSE-SU-2026:0885-1 |
| SLES 16.0 | curl +1 | 8.14.1-160000.5.1 | SUSE-SU-2026:20918-1 |
| SLE Micro 6.2 | curl | 8.14.1-160000.5.1 | SUSE-SU-2026:20760-1 |
| SLE Micro 6.1 | curl | 8.14.1-slfo.1.1_6.1 | SUSE-SU-2026:20668-1 |
| SLE Micro 6.0 | curl | 8.14.1-5.1 | SUSE-SU-2026:20722-1 |
| SLE Micro 5.5 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SLE Micro 5.4 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SLE Micro 5.3 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SLE Micro 5.2 | curl | 8.14.1-150200.4.103.1 | SUSE-SU-2026:0879-1 |
| SLE HPC 15 SP5 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SLE HPC 15 SP4 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | curl | 8.14.1-150400.5.80.1 | SUSE-SU-2026:0911-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 8.19.0-1.1 | openSUSE-SU-2026:10371-1 |
| openSUSE Leap 16.0 | curl | 8.14.1-160000.5.1 | openSUSE-SU-2026:20404-1 |
| openSUSE Leap 15.6 | curl | 8.14.1-150600.4.40.1 | SUSE-SU-2026:0885-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 8.19.0-r0 | — |
| Alpine v3.23 | curl | 8.19.0-r0 | — |
| Alpine v3.22 | curl | 8.14.1-r4 | — |
| Alpine v3.21 | curl | 8.14.1-r3 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | curl | 8.11.1-6 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | curl +3 | 8.12.1-4.el10_2.4 | ELSA-2026-55450 |
| Oracle Linux 9 | curl +4 | 7.76.1-40.el9_8.5 | ELSA-2026-55439 |
Advisories 31
- WID-SEC-2026-0690 cURL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- WID-SEC-2026-2189 Dell PowerProtect Data Domain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2026
- ALSA-2026:55439 Important: curl security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:7432 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:77255 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:72506 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:6893 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:55450 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:55439 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- WID-SEC-2026-2872 Apple Safari, macOS, iOS und iPadOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 14, 2026
- WID-SEC-2026-2543 Apple macOS (Tahoe, Sonoma und Sequoia): Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 14, 2026
- WID-SEC-2026-2537 Apple iOS und iPadOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 14, 2026
- NCSC-2026-0319 Kwetsbaarheden verholpen in Apple iOS en iPadOS NCSC-NL (Netherlands) · Aug 20, 2026
- RLSA-2026:55439 Important: curl security update Rocky Linux Security Advisories · Aug 17, 2026
- ELSA-2026-55450 Important: curl security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 17, 2026
- ELSA-2026-55439 Important: curl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 17, 2026
- NCSC-2026-0267 Kwetsbaarheden verholpen in Apple MacOS NCSC-NL (Netherlands) · Jul 28, 2026
- NCSC-2026-0266 Kwetsbaarheden verholpen in Apple iOS en iPadOS NCSC-NL (Netherlands) · Jul 28, 2026
- USN-8084-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-8099-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2026:20918-1 Security update for curl SUSE / openSUSE Security Updates · Apr 2, 2026
- openSUSE-SU-2026:20404-1 Security update for curl SUSE / openSUSE Security Updates · Mar 29, 2026
- SUSE-SU-2026:20760-1 Security update for curl SUSE / openSUSE Security Updates · Mar 25, 2026
- SUSE-SU-2026:20722-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20668-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0911-1 Security update for curl SUSE / openSUSE Security Updates · Mar 19, 2026
- SUSE-SU-2026:0921-1 Security update for curl SUSE / openSUSE Security Updates · Mar 19, 2026
- SUSE-SU-2026:0903-1 Security update for curl SUSE / openSUSE Security Updates · Mar 18, 2026
- openSUSE-SU-2026:10371-1 curl-8.19.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 15, 2026
- SUSE-SU-2026:0885-1 Security update for curl SUSE / openSUSE Security Updates · Mar 13, 2026
- SUSE-SU-2026:0879-1 Security update for curl SUSE / openSUSE Security Updates · Mar 13, 2026