Vulnerability

[ Description ]Official description

FasterXML Jackson 1.x, confirmed in jackson-mapper-asl versions 1.8.3, 1.9.2, 1.9.11, 1.9.12, and 1.9.13, allows attackers to cause a denial of service by supplying deeply nested JSON input to an application that deserializes untrusted JSON using ObjectMapper.readValue.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund15 Oct 2026WID-SEC-2026-4003

  FasterXML Jackson: Vulnerability allows denial of service Translated from German

  CVE-2026-95155

[ References ]References

• github.com/FasterXML/jackson-1
• github.com/FasterXML/jackson-1/issues/11