Home / mailings

PDF

[USN-8062-1] curl vulnerabilities

Posted on 25 February 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8062-1
February 25, 2026

curl vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in curl.

Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries

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 25.10
curl 8.14.1-2ubuntu1.1
libcurl3t64-gnutls 8.14.1-2ubuntu1.1
libcurl4-gnutls-dev 8.14.1-2ubuntu1.1
libcurl4-openssl-dev 8.14.1-2ubuntu1.1
libcurl4t64 8.14.1-2ubuntu1.1

Ubuntu 24.04 LTS
curl 8.5.0-2ubuntu10.7
libcurl3t64-gnutls 8.5.0-2ubuntu10.7
libcurl4-gnutls-dev 8.5.0-2ubuntu10.7
libcurl4-openssl-dev 8.5.0-2ubuntu10.7
libcurl4t64 8.5.0-2ubuntu10.7

Ubuntu 22.04 LTS
curl 7.81.0-1ubuntu1.22
libcurl3-gnutls 7.81.0-1ubuntu1.22
libcurl3-nss 7.81.0-1ubuntu1.22
libcurl4 7.81.0-1ubuntu1.22
libcurl4-gnutls-dev 7.81.0-1ubuntu1.22
libcurl4-nss-dev 7.81.0-1ubuntu1.22
libcurl4-openssl-dev 7.81.0-1ubuntu1.22

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8062-1
CVE-2025-10148, CVE-2025-11563, CVE-2025-13034, CVE-2025-14017,
CVE-2025-14524, CVE-2025-14819, CVE-2025-15079, CVE-2025-15224,
CVE-2025-9086

Package Information:
https://launchpad.net/ubuntu/+source/curl/8.14.1-2ubuntu1.1
https://launchpad.net/ubuntu/+source/curl/8.5.0-2ubuntu10.7
https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.22

--===============1953469087022891083==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP