--- title: "FasterXML Jackson - Denial of Service" description: "FasterXML Jackson 1.x including jackson-mapper-asl 1.8.3, 1.9.2, 1.9.11, 1.9.12, and 1.9.13 contains a denial of service caused by processing deeply nested JSON input in ObjectMapper.readValue, letting attackers cause application crash, exploit requires deserialization of untrusted JSON." url: https://panop.io/threat-heartbeat/CVE-2026-95155/ --- # CVE-2026-95155 FasterXML Jackson - Denial of Service FasterXML Jackson 1.x including jackson-mapper-asl 1.8.3, 1.9.2, 1.9.11, 1.9.12, and 1.9.13 contains a denial of service caused by processing deeply nested JSON input in ObjectMapper.readValue, letting attackers cause application crash, exploit requires deserialization of untrusted JSON. CVSS base score 7.5 /10 High CISA KEV Not listed Public exploit None known Authentication Not required [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-95155) ## Details Type Insecure Deserialization Impact Denial Of Service CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Published 15 October 2026 Updated 16 October 2026 Weakness [CWE-674](https://cwe.mitre.org/data/definitions/674.html) ## Vendor fix Update to the latest version of FasterXML Jackson. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-95155](https://nvd.nist.gov/vuln/detail/CVE-2026-95155) - [https://github.com/FasterXML/jackson-1/issues/11](https://github.com/FasterXML/jackson-1/issues/11) - [https://github.com/FasterXML/jackson-1](https://github.com/FasterXML/jackson-1) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)