========================================================================== Ubuntu Security Notice USN-8062-2 March 03, 2026
curl vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in curl.
Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries
Details:
USN-8062-1 fixed vulnerabilities in curl. This update provides the
corresponding update for CVE-2025-14017, CVE-2025-15079, and CVE-2025-15224
for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04
LTS.
Original advisory details:
It was discovered that curl incorrectly handled cookies when redirected
from secure to insecure connections. An attacker could possibly use this
issue to cause a denial of service, or obtain sensitive information.
This issue only affected Ubuntu 25.10. (CVE-2025-9086)
Calvin Ruocco discovered that curl did not properly handle WebSocket
communications under certain circumstances. A malicious server could
possibly use this issue to poison proxy caches with malicious content.
This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10.
(CVE-2025-10148)
Stanislav Fort discovered that wcurl did not properly handle URLs with
certain encoded characters. If a user were tricked into processing
a specially crafted URL, an attacker could possibly use this issue to
write files outside the intended directory. This issue only affected
Ubuntu 25.10. (CVE-2025-11563)
Stanislav Fort discovered that curl did not properly validate pinned
public keys under certain circumstances. A remote attacker could
possibly use this issue to perform a machine-in-the-middle attack. This
issue only affected Ubuntu 25.10.(CVE-2025-13034)
Stanislav Fort discovered that curl did not properly manage TLS options
when performing LDAP over TLS transfers in multi-threaded environments.
Under certain circumstances, certificate verification could be
unintentionally and unknowingly disabled. (CVE-2025-14017)
It was discovered that curl incorrectly handled Oauth2 bearer tokens
when following redirects. A remote attacker could possibly use this
issue to obtain authentication credentials. (CVE-2025-14524)
Stanislav Fort discovered that curl did not properly validate TLS
certificates when reusing connections. A remote attacker could possibly
use this issue to bypass expected certificate verification. This issue
only affected Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2025-14819)
Harry Sintonen discovered that curl did not properly validate SSH host
keys when performing SSH-based file transfers. This issue could lead to
unintended bypass of custom known_hosts file. This issue only
affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-15079)
Harry Sintonen discovered that curl built with libssh did not properly
handle authentication when performing SSH-based file transfers. This
could result in unintended authentication operations. This issue only
affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-15224)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
curl 7.68.0-1ubuntu2.25+esm2
Available with Ubuntu Pro
libcurl4 7.68.0-1ubuntu2.25+esm2
Available with Ubuntu Pro
Ubuntu 18.04 LTS
curl 7.58.0-2ubuntu3.24+esm7
Available with Ubuntu Pro
libcurl4 7.58.0-2ubuntu3.24+esm7
Available with Ubuntu Pro
Ubuntu 16.04 LTS
curl 7.47.0-1ubuntu2.19+esm15
Available with Ubuntu Pro
libcurl3 7.47.0-1ubuntu2.19+esm15
Available with Ubuntu Pro
Ubuntu 14.04 LTS
curl 7.35.0-1ubuntu2.20+esm19
Available with Ubuntu Pro
libcurl3 7.35.0-1ubuntu2.20+esm19
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8062-2
https://ubuntu.com/security/notices/USN-8062-1
CVE-2025-14017, CVE-2025-15079, CVE-2025-15224
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