Description
Importing a `includeSubDomains` parent HSTS entry before a longer-lived child
entry, silently drops the child. Consequently, when the parent expires, the
child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP
requests rather than upgrading to HTTPS.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| curl | curl | 8.22.0 – ≤ 8.22.0, 8.21.0 – ≤ 8.21.0, 8.20.0 – ≤ 8.20.0, 8.19.0 – ≤ 8.19.0, 8.18.0 – ≤ 8.18.0, 8.17.0 – ≤ 8.17.0, 8.16.0 – ≤ 8.16.0, 8.15.0 – ≤ 8.15.0, 8.14.1 – ≤ 8.14.1, 8.14.0 – ≤ 8.14.0, 8.13.0 – ≤ 8.13.0, 8.12.1 – ≤ 8.12.1, 8.12.0 – ≤ 8.12.0, 8.11.1 – ≤ 8.11.1, 8.11.0 – ≤ 8.11.0 | — |
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 | No fix yet | — |
| Debian 13 | curl | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | curl | 8.20.0-2ubuntu11.1 | USN-8927-2 |
| Ubuntu 26.04 LTS | curl | 8.18.0-1ubuntu2.8 | USN-8927-1 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.16 | USN-8932-1 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.30 | USN-8932-1 |
Show 4 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+esm10 | USN-8932-1 |
| Ubuntu Pro 18.04 LTS | curl | 7.58.0-2ubuntu3.24+esm15 | USN-8932-1 |
| Ubuntu Pro 16.04 LTS | curl | 7.47.0-1ubuntu2.19+esm21 | USN-8932-1 |
| Ubuntu Pro 14.04 LTS | curl | 7.35.0-1ubuntu2.20+esm24 | USN-8932-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | curl +3 | 8.23.0-0.1.hum1 | RHSA-2026:82895 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | curl | 8.22.0-150700.7.33.1 | SUSE-SU-2026:5068-1 |
| SLES 15 SP6 | curl | 8.22.0-150600.4.58.1 | SUSE-SU-2026:5069-1 |
| SLES 15 SP5 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SLES 15 SP4 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | curl | 8.22.0-150600.4.58.1 | SUSE-SU-2026:5069-1 |
| SLE Micro 5.5 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SLE Micro 5.4 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SLE Micro 5.3 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SLE HPC 15 SP5 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SLE HPC 15 SP4 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | curl | 8.14.1-150400.5.98.1 | SUSE-SU-2026:4954-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 8.23.0-1.1 | openSUSE-SU-2026:12150-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 8.23.0-r0 | — |
| Alpine v3.23 | curl | 8.23.0-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | curl +2 | No fix yet | — |
Advisories 9
- WID-SEC-2026-3904 cURL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- SUSE-SU-2026:5069-1 Security update for curl SUSE / openSUSE Security Updates · Nov 3, 2026
- SUSE-SU-2026:5068-1 Security update for curl SUSE / openSUSE Security Updates · Nov 3, 2026
- USN-8932-1 curl vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8927-1 curl vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8927-2 curl vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- SUSE-SU-2026:4954-1 Security update for curl SUSE / openSUSE Security Updates · Nov 2, 2026
- RHSA-2026:82895 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 18, 2026
- openSUSE-SU-2026:12150-1 curl-8.23.0-1.1 on GA media SUSE / openSUSE Security Updates · Oct 17, 2026