Multiple critical vulnerabilities in OpenJDK 26, including missing API authentication in JAXP (CVE-2026-22016, CVSS 7.5) and Networking (CVE-2026-34282, CVSS 7.5) components, allow remote unauthenticated attackers to cause denial of service or gain unauthorized access to sensitive information. Affected Oracle JRE versions include 1.8.0, 11.0.30, 17.0.18, 21.0.10, and 25.0.2, as detailed in the NVD data. The advisory references updated packages containing security fixes, but the specific patched version number is not provided in the source material.
Thomas Beckers discovered that the JAXP component of OpenJDK 26 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to gain unauthorized access to sensitive information. (CVE-2026-22016) It was discovered that the Networking component of OpenJDK 26 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-34282) It was discovered that the JSSE component of OpenJDK 26 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-22021) It was discovered that the JGSS component of OpenJDK 26 did not correctly authenticate certain APIs. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-22013) It was discovered that the 2D component of OpenJDK 26 did not correctly handle certain integer arithmetic. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to obtain sensitive information. (CVE-2026-23865) It was discovered that the Libraries component of OpenJDK 26 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to modify data. (CVE-2026-22008) It was discovered that the Libraries component of OpenJDK 26 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-22018) Ken Pyle discovered that the Security component of OpenJDK 26 did not correctly authenticate certain APIs. A local attacker could possibly use this issue to obtain sensitive information. (CVE-2026-22007, CVE-2026-34268) In addition to security fixes, the updated packages contain bug fixes, new features, and possibly incompatible changes. Please see the following for more information: https://openjdk.org/groups/vulnerability/advisories/2026-04-21