Description
curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a
server, even if the new request uses different credentials for the HTTP proxy.
The proper behavior is to create or use a separate connection.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| curl | curl | 7.7.0 – < 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… | 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 |
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 |
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 |
Advisories 29
- 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
- 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
- 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
- ELSA-2026-55450 Important: curl security update (Oracle Linux 10) 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
- ICSA-26-188-05 Siemens SINEC OS CISA ICS & IT advisories · Jul 7, 2026
- SSA-253495 SSA-253495: Multiple Vulnerabilities in SINEC OS before V4.0 Siemens ProductCERT · Jun 2, 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