Description
1. A cookie is set using the `secure` keyword for `https://target`
2. curl is redirected to or otherwise made to speak with `http://target` (same
hostname, but using clear text HTTP) using the same cookie set
3. The same cookie name is set - but with only a slash as path (`path="/"`).
Since this site is not secure, the cookie *should* be ignored.
4. A bug in the path comparison logic makes curl read outside a heap buffer
boundary
The bug either causes a crash or it potentially makes the comparison come to
the wrong conclusion and lets the clear-text site override the contents of the
secure cookie, contrary to expectations and depending on the memory contents
immediately following the single-byte allocation that holds the path.
The presumed and correct behavior would be to plainly ignore the second set of
the cookie since it was already set as secure on a secure host so overriding
it on an insecure host should not be okay.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| curl | curl | 8.13.0 – < 8.14.2, 8.15.0 – < 8.16.0, 8.15.0, 8.14.1, 8.14.0, 8.13.0 | 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 | 8.16.0~rc2-1 | — |
| Debian 13 | curl | 8.14.1-2+deb13u1 | — |
| Debian 11 | curl | 7.74.0-1.3+deb11u16 | DLA-4432-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | curl | 8.14.1-2ubuntu1.1 | USN-8062-1 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.7 | USN-8062-1 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.22 | USN-8062-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | curl +3 | 8.12.1-2.el10_1.2 | RHSA-2026:1825 |
| RHEL 9 | curl +4 | 7.76.1-35.el9_7.3 | RHSA-2026:1350 |
| RHEL 8 | curl +3 | 7.61.1-34.el8_10.9 | RHSA-2025:23383 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | curl +2 | 8.12.1-1.el10_0.4 | RHSA-2026:1477 |
| RHEL 9.6 EUS | curl +4 | 7.76.1-31.el9_6.2 | RHSA-2025:23043 |
| RHEL 9.4 EUS | curl +3 | 7.76.1-29.el9_4.3 | RHSA-2025:23125 |
| RHEL 9.2 E4S | curl +3 | 7.76.1-23.el9_2.8 | RHSA-2025:23127 |
| RHEL 9.0 E4S | curl +3 | 7.76.1-14.el9_0.12 | RHSA-2025:23126 |
| Red Hat Hardened Images 1 | curl +3 | 8.19.0-3.hum1 | RHSA-2026:82895, RHSA-2026:77255, RHSA-2026:6893 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | curl +3 | 8.12.1-2.el10_1.2 | ALSA-2026:1825 |
| AlmaLinux 9 | curl +4 | 7.76.1-35.el9_7.3 | ALSA-2026:1350 |
| AlmaLinux 8 | curl +3 | 7.61.1-34.el8_10.9 | ALSA-2025:23383 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | curl | 8.12.1-2.el10_1.2 | RLSA-2026:1825 |
| Rocky Linux 9 | curl | 7.76.1-35.el9_7.3 | RLSA-2026:1350 |
| Rocky Linux 8 | curl | 7.61.1-34.el8_10.9 | RLSA-2025:23383 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES 15 SP7 | curl | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 |
| SLES 15 SP6 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES 15 SP6 | curl | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 |
| SLES 15 SP5 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES 15 SP5 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLES 15 SP4 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES 15 SP4 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLES 15 SP3 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES 15 SP3 | curl | 8.14.1-150200.4.91.1 | SUSE-SU-2025:03268-1 |
Show 22 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | curl | 8.0.1-11.108.1 | SUSE-SU-2025:03173-1 |
| SLES for SAP 16.0 | curl +1 | 8.14.1-160000.3.1 | SUSE-SU-2025:21145-1 |
| SLES for SAP 15 SP5 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES for SAP 15 SP4 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES for SAP 15 SP4 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLES for SAP 15 SP3 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLES for SAP 15 SP3 | curl | 8.14.1-150200.4.91.1 | SUSE-SU-2025:03268-1 |
| SLES 16.0 | curl +1 | 8.14.1-160000.3.1 | SUSE-SU-2025:21145-1 |
| SLE Micro 6.2 | curl | 8.14.1-160000.3.1 | SUSE-SU-2025:21077-1 |
| SLE Micro 6.1 | curl | 8.14.1-slfo.1.1_2.1 | SUSE-SU-2025:20802-1 |
| SLE Micro 6.0 | curl | 8.14.1-1.1 | SUSE-SU-2025:20824-1 |
| SLE Micro 5.5 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE Micro 5.5 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLE Micro 5.4 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE Micro 5.4 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLE Micro 5.3 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE Micro 5.3 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLE Micro 5.2 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE Micro 5.2 | curl | 8.14.1-150200.4.91.1 | SUSE-SU-2025:03268-1 |
| SLE Micro 5.1 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE Micro 5.1 | curl | 8.14.1-150200.4.91.1 | SUSE-SU-2025:03268-1 |
| SLE HPC 15 SP5 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE HPC 15 SP5 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLE HPC 15 SP4 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE HPC 15 SP4 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SLE HPC 15 SP3 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SLE HPC 15 SP3 | curl | 8.14.1-150200.4.91.1 | SUSE-SU-2025:03268-1 |
| SUSE Manager Server LTS 4.3 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SUSE Manager Server LTS 4.3 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SUSE Manager Proxy LTS 4.3 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SUSE Manager Proxy LTS 4.3 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | curl | 8.14.1-150400.5.69.1 | SUSE-SU-2025:03267-1 |
| SUSE Enterprise Storage 7.1 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| SUSE Enterprise Storage 7.1 | curl | 8.14.1-150200.4.91.1 | SUSE-SU-2025:03268-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 8.16.0-1.1 | openSUSE-SU-2025:15590-1 |
| openSUSE Leap 16.0 | curl | 8.14.1-160000.3.1 | openSUSE-SU-2025:20090-1 |
| openSUSE Leap 15.6 | brotli | 1.0.7-150200.3.5.1 | SUSE-SU-2025:03268-1 |
| openSUSE Leap 15.6 | curl | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 8.16.0-r0 | — |
| Alpine v3.23 | curl | 8.16.0-r0 | — |
| Alpine v3.22 | curl | 8.14.1-r2 | — |
| Alpine v3.21 | curl | 8.14.1-r2 | — |
| Alpine v3.20 | curl | 8.14.1-r2 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 8.14.1-r2 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | curl +4 | 8.15.0-4.amzn2023.0.1 | ALAS2023-2025-1351 |
| Amazon Linux 2 | curl +2 | 8.3.0-1.amzn2.0.10 | ALAS2-2025-3056 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | curl +3 | 8.12.1-2.el10_1.2 | ELSA-2026-1825 |
| Oracle Linux 9 | curl +4 | 7.76.1-35.el9_7.3 | ELSA-2026-1350 |
| Oracle Linux 8 | curl +3 | 7.61.1-34.el8_10.9 | ELSA-2025-23383 |
Advisories 50
- WID-SEC-2025-2023 cURL: Mehrere Schwachstellen ermöglichen Manipulation von Dateien 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-2026:1825 Moderate: curl security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:1350 Moderate: curl security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:23383 Moderate: curl security update AlmaLinux Security Advisories · Oct 29, 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
- 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-2026:6893 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:1825 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:1477 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:1350 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:23383 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:23127 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:23125 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:23126 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:23043 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- WID-SEC-2026-0783 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- WID-SEC-2026-2253 IBM Security Verify Access: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 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
- WID-SEC-2026-0168 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 21, 2026
- USN-8062-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- WID-SEC-2026-1202 Oracle Hyperion: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- WID-SEC-2026-1194 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- openSUSE-SU-2025:20090-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15590-1 curl-8.16.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21145-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21077-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03198-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20802-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03173-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20824-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- ICSA-26-043-06 Siemens SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-089022 SSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3 Siemens ProductCERT · Feb 24, 2026
- WID-SEC-2025-2836 Apple iOS und iPadOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 11, 2026
- RLSA-2026:1825 Moderate: curl security update Rocky Linux Security Advisories · Feb 6, 2026
- SUSE-SU-2025:03267-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:03268-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2026-1825 Moderate: curl security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Feb 3, 2026
- RLSA-2026:1350 Moderate: curl security update Rocky Linux Security Advisories · Jan 30, 2026
- ELSA-2026-1350 Moderate: curl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 27, 2026
- NCSC-2026-0032 Kwetsbaarheden verholpen in Oracle MySQL NCSC-NL (Netherlands) · Jan 21, 2026
- NCSC-2026-0023 Kwetsbaarheden verholpen in Oracle PeopleSoft NCSC-NL (Netherlands) · Jan 21, 2026
- NCSC-2026-0020 Kwetsbaarheden verholpen in Oracle Commerce NCSC-NL (Netherlands) · Jan 21, 2026
- WID-SEC-2026-0167 Oracle PeopleSoft: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2026-0154 Oracle Commerce: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- ALAS2023-2025-1351 Moderate: curl security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jan 7, 2026
- DLA-4432-1 curl - security update Debian Security (DSA / DLA) · Jan 5, 2026
- RLSA-2025:23383 Moderate: curl security update Rocky Linux Security Advisories · Dec 19, 2025