========================================================================== 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
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